Step 1: Preheat and Prepare
Preheat your oven to 425°F (220°C). Place a large, rimmed baking sheet in the oven as it preheats. Getting the pan hot before adding the radishes helps to create a better sear and prevents them from sticking.

Step 2: Prepare the Radishes
Thoroughly wash the radishes to remove any grit. Pat them completely dry with a clean kitchen towel or paper towels—this is a crucial step for achieving browning rather than steaming. Trim off the root tip and the leafy green stem. (Pro tip: Don’t throw away the greens! See our tips section for ideas). Cut the radishes in half. If you have any particularly large radishes, quarter them so that all the pieces are roughly the same size for even cooking.

Step 3: Season the Radishes
In a medium-sized mixing bowl, combine the prepared radishes, olive oil, smashed or minced garlic, coarse sea salt, and freshly ground black pepper. If you are using woody, hearty herbs like fresh rosemary or thyme, add them now so their flavors can infuse the oil during roasting. Toss everything together until each radish is evenly coated in the oil and seasonings.

Step 4: Roast to Perfection
Carefully remove the hot baking sheet from the oven. Spread the seasoned radishes onto the pan in a single, even layer. Make sure there is space between the pieces. If they are too crowded, they will steam instead of roast. Roast for 20-25 minutes, tossing them with a spatula halfway through the cooking time. They are done when they are tender enough to be easily pierced with a fork and have developed beautiful golden-brown, caramelized spots.

Step 5: Finish with Fresh Herbs
Remove the radishes from the oven. If you are using delicate fresh herbs like parsley, chives, or dill, add them now. The residual heat will wilt them slightly and release their fresh aroma without cooking them into oblivion. Give them one last toss, taste, and adjust the salt and pepper if necessary before serving hot.