Follow these simple steps to create your 20 Minute Mini Baked Chicken Tacos:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Cook the Chicken: In a large skillet, heat the olive oil over medium heat. Add the ground chicken and cook until browned, approximately 5-7 minutes.
3. Add Seasoning: Stir in the taco seasoning, ensuring the chicken is evenly coated. Cook for an additional 2 minutes to incorporate the flavors.
4. Prepare Taco Shells: While the chicken is cooking, arrange the mini taco shells on a baking sheet.
5. Fill the Shells: Spoon the cooked chicken mixture into each mini taco shell, filling them generously.
6. Add Cheese: Sprinkle the shredded cheese over the filled taco shells.
7. Bake: Place the baking sheet in the preheated oven and bake for 5-7 minutes, or until the cheese is melted and bubbly.
8. Prepare Toppings: While the tacos bake, chop your lettuce, tomatoes, and onions.
9. Serve: Once the tacos are ready, remove them from the oven. Let them cool for a minute before topping them with lettuce, tomatoes, and onions. Add sour cream and salsa as needed.

These simple steps will guide you to creating a festive meal with minimal time and effort.