1. Prepare the Taco Meat Filling:
* Heat the olive oil or vegetable oil in a large skillet or Dutch oven over medium-high heat.
* Add the finely chopped onion and cook for 5-7 minutes, or until softened and translucent.
* Add the minced garlic and cook for another minute until fragrant, stirring constantly to prevent burning.
* Add the ground beef to the skillet. Cook, breaking it apart with a spoon, until it’s thoroughly browned and no pink remains (about 8-10 minutes).
* Drain off any excess fat from the skillet. This is important for a less greasy filling.
* Return the skillet to the heat. Stir in the taco seasoning (store-bought packet or homemade blend). Cook for 1-2 minutes, stirring, to toast the spices and coat the meat.
* Pour in the water or beef broth. Bring the mixture to a simmer.
* Reduce the heat to low, cover, and let it simmer for 15-20 minutes, stirring occasionally. This allows the flavors to meld and the sauce to thicken slightly. If it becomes too dry, add a little more water or broth.
* Taste and adjust seasoning with salt and pepper if needed. Keep the meat warm until ready to serve (a slow cooker on the “warm” setting is perfect for this if making ahead or serving over a longer period).

2. Prepare the Toppings Bar:
* While the meat is simmering, prepare all your chosen toppings.
* Wash and chop/shred the lettuce.
* Dice the tomatoes and onions.
* Shred the cheeses (if not using pre-shredded).
* Chop the cilantro.
* Arrange all toppings in individual bowls or a compartmentalized serving tray. Make it look inviting and colorful!
* Ensure salsas, sour cream, and guacamole are in easily accessible bowls with serving spoons.

3. Assemble the Walking Tacos (The Fun Part!):
* This is where your guests become the chefs! Instruct them on the process:
1. Choose Your Chip Bag: Select a single-serving bag of their favorite chips.
2. Crush Lightly (Optional but Recommended): Gently crush the chips inside the bag with their hands to break them into slightly smaller, more manageable pieces. Don’t pulverize them!
3. Open the Bag: Carefully cut open the top of the chip bag lengthwise (like a boat) with scissors, or if preferred, open it from the side. The lengthwise cut provides a wider opening for easier filling and eating.
4. Layer in the Goodness:
* Start with a generous scoop (or two) of the warm taco meat directly into the chip bag, on top of the crushed chips.
* Next, layer on their desired toppings: cheese, lettuce, tomatoes, onions, salsa, sour cream, guacamole, jalapeños, olives, cilantro, etc. Encourage them to be creative!
5. Grab a Fork (or Spork!) and Dig In: Mix everything gently with a fork or spork and enjoy immediately while the chips are still crunchy and the meat is warm.