Ingredients
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- For the Crust (Homemade or Store-Bought):
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- All-Purpose Flour: 1 ¼ cups all-purpose flour (if making homemade crust). Use good quality all-purpose flour for a tender and flaky crust. For a gluten-free option, use a gluten-free all-purpose flour blend designed for baking.
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- Salt: ½ teaspoon salt (if making homemade crust). Salt enhances the flavor of the crust and balances the sweetness of the filling.
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- Unsalted Butter: ½ cup (1 stick), cold and cubed (if making homemade crust). Cold butter is crucial for creating flaky layers in the crust. Ensure it’s unsalted to control the overall saltiness of the tart.
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- Ice Water: ¼ cup to ½ cup, or as needed (if making homemade crust). Ice water keeps the butter cold and helps to bring the dough together. Add it gradually until the dough just comes together.
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- Refrigerated Pie Crust: 1 box (14.1 ounces) refrigerated pie crusts (for a quicker option). Using store-bought refrigerated pie crust is a convenient shortcut that still yields delicious results. Choose a good quality brand for best flavor and texture. You will typically use one crust for this tart.
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- For the Crust (Homemade or Store-Bought):
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- For the Filling:
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- Asparagus: 1 pound fresh asparagus, trimmed and cut into 1-inch pieces. Fresh asparagus is essential for this spring tart. Look for firm, bright green spears with tightly closed tips. Trimming the tough woody ends is important for best texture.
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- Cooked Ham: 8 ounces cooked ham, diced. Use good quality cooked ham, such as Black Forest ham, smoked ham, or leftover holiday ham. Dicing it into small pieces ensures even distribution in the tart filling. You can also use prosciutto or pancetta for a different flavor profile.
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- Gruyère Cheese: 1 cup shredded Gruyère cheese. Gruyère cheese is the star of this tart, offering a nutty, slightly sweet, and complex flavor that melts beautifully. Freshly shredded Gruyère is always recommended over pre-shredded for better melting and flavor. You can substitute with Swiss cheese, Emmental, or Jarlsberg if Gruyère is not available.
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- Eggs: 4 large eggs. Eggs are the binding agent for the filling, creating a creamy and custard-like texture. Use large eggs for consistent results.
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- Heavy Cream: ¾ cup heavy cream. Heavy cream adds richness and creaminess to the filling. You can substitute with half-and-half for a slightly lighter tart, but the texture will be less rich.
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- Whole Milk: ¼ cup whole milk. Whole milk adds moisture and balances the richness of the heavy cream. You can use 2% milk in a pinch, but whole milk provides the best flavor and texture.
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- Shallot: 1 small shallot, finely minced. Shallot adds a delicate onion-like flavor that enhances the savory notes of the tart. You can substitute with a small amount of finely minced yellow onion or scallion if shallot is not available.
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- Fresh Thyme: 1 tablespoon fresh thyme leaves, chopped. Fresh thyme adds a fragrant, earthy, and slightly lemony flavor that complements ham, asparagus, and Gruyère beautifully. You can substitute with dried thyme (about 1 teaspoon), but fresh thyme is preferred for its brighter flavor.
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- Dijon Mustard: 1 teaspoon Dijon mustard. Dijon mustard adds a subtle tang and depth of flavor to the filling. It also helps to balance the richness and adds a slight complexity.
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- Salt: ½ teaspoon salt, or to taste. Salt enhances the flavors of all the ingredients in the filling. Adjust to taste, considering the saltiness of the ham and Gruyère cheese.
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- Black Pepper: ¼ teaspoon black pepper, freshly ground, or to taste. Freshly ground black pepper adds a pungent spice and aroma. Adjust to taste.
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- Nutmeg (Optional): Pinch of ground nutmeg. A pinch of nutmeg adds a warm, subtle spice that complements the cheesy and savory flavors. Use it sparingly as nutmeg can be overpowering.
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- Olive Oil: 1 tablespoon olive oil (for sautéing asparagus and shallot). Olive oil is used for sautéing the asparagus and shallot, adding flavor and helping them to soften slightly before baking. You can use butter instead for a richer flavor.
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- Egg Wash (Optional, for a golden crust): 1 egg yolk beaten with 1 tablespoon water (for brushing the crust, if making homemade). Egg wash creates a golden brown and glossy crust. It’s optional but recommended for a more visually appealing tart.
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- For the Filling:
Instructions
Step 1: Prepare the Crust (If Making Homemade):
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- Combine Dry Ingredients: In a large bowl, whisk together the flour and salt.
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- Cut in Butter: Add the cold, cubed butter to the flour mixture. Using a pastry blender or your fingertips, cut the butter into the flour until the mixture resembles coarse crumbs with some pea-sized pieces of butter remaining. Work quickly to keep the butter cold.
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- Add Ice Water: Gradually add ice water, one tablespoon at a time, mixing gently after each addition, until the dough just comes together. Be careful not to add too much water. The dough should be moist but not sticky.
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- Form Dough and Chill: Gather the dough into a disc, wrap it in plastic wrap, and flatten it slightly. Refrigerate for at least 30 minutes, or up to 2 hours. Chilling allows the gluten to relax and the butter to firm up, resulting in a tender and flaky crust.
Step 2: Prepare the Asparagus and Shallot:
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- Preheat Oven and Prepare Baking Sheet: Preheat oven to 375°F (190°C). Line a baking sheet with parchment paper.
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- Sauté Asparagus and Shallot: Heat olive oil in a large skillet over medium heat. Add the asparagus and minced shallot and sauté for 3-5 minutes, until the asparagus is bright green and slightly tender-crisp. Do not overcook the asparagus as it will continue to cook in the oven. Season lightly with salt and pepper. Set aside to cool slightly.
Step 3: Prepare the Filling:
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- Whisk Eggs and Dairy: In a large bowl, whisk together the eggs, heavy cream, and whole milk until well combined.
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- Add Seasonings: Whisk in Dijon mustard, chopped fresh thyme, salt, black pepper, and nutmeg (if using).
Step 4: Assemble the Tart:
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- Roll Out Crust (If Homemade): On a lightly floured surface, roll out the chilled dough into a 12-inch circle, about ⅛-inch thick. If using store-bought crust, simply unroll one crust.
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- Transfer Crust to Tart Pan: Gently transfer the crust to a 9-inch tart pan with a removable bottom. Press the crust into the bottom and up the sides of the pan. Trim any excess dough hanging over the edge. You can crimp the edges for a decorative finish, or simply leave them as they are.
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- Blind Bake Crust (Optional but Recommended for a Crispier Bottom): For a crispier bottom crust, you can blind bake it. Line the crust with parchment paper and fill with pie weights or dried beans. Bake for 15 minutes. Remove the parchment paper and weights and bake for another 5-7 minutes, until the crust is lightly golden. Let cool slightly. Skipping blind baking will result in a slightly softer bottom crust.
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- Layer Filling Ingredients: Sprinkle half of the shredded Gruyère cheese evenly over the bottom of the prepared tart crust.
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- Arrange Asparagus and Ham: Arrange the sautéed asparagus and diced ham evenly over the cheese layer.
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- Pour Egg Mixture: Pour the egg mixture evenly over the asparagus and ham.
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- Top with Remaining Cheese: Sprinkle the remaining Gruyère cheese over the egg mixture.
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- Brush Crust with Egg Wash (Optional, if using homemade crust): If using homemade crust and desired, brush the edges of the crust with egg wash for a golden brown finish.
Step 5: Bake the Tart:
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- Bake: Bake in the preheated oven for 35-45 minutes, or until the crust is golden brown and the filling is set and lightly golden on top. A knife inserted into the center of the filling should come out mostly clean (a little moistness is okay). The tart should be puffed and golden brown.
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- Cool Slightly: Let the tart cool in the pan on a wire rack for at least 10-15 minutes before slicing and serving. Cooling slightly allows the filling to set further and makes slicing easier.
Nutrition
- Serving Size: one normal portion
- Calories: 350-450
- Sugar: 2-4 grams
- Sodium: 400-600 mg
- Fat: 25-35 grams
- Saturated Fat: 15-20 grams
- Carbohydrates: 20-30 grams
- Fiber: 2-3 grams
- Protein: 15-20 grams
- Cholesterol: 150-200 mg