Creating these 20 Minute Mini Baked Chicken Tacos is as simple as following these straightforward steps:

1. Preheat the Oven: Begin by preheating your oven to 375°F (190°C).
2. Cook the Chicken: In a skillet over medium heat, cook the ground chicken until fully cooked, about 5-7 minutes.
3. Add Seasoning: Stir in the taco seasoning and 1/2 cup of water. Cook for another 2-3 minutes until combined.
4. Prepare Tortillas: Fill each mini corn tortilla with a spoonful of the seasoned chicken mixture, a sprinkle of shredded cheese, diced tomatoes, and diced onions.
5. Arrange Tacos: Place the filled mini tacos upright in a baking dish. They should fit snugly to prevent falling over.
6. Bake: Bake in the preheated oven for 10 minutes, or until the cheese is melted and the tortillas are slightly crispy.
7. Garnish: Once cooked, sprinkle with chopped cilantro, if desired.
8. Serve: Allow to cool slightly before serving.

By following these steps, you will create a delightful tray full of mini tacos that are not only tasty but also visually appealing!