Take a 9x13 baking and spray it with nonstick spray. Preheat the oven to 400F and move towards the next step.

Now take a medium skillet and heat olive oil in it over medium heat.

Add onion and cook for 3-4 minutes or until fragrant and translucent.

Add chicken, tomatoes, taco seasoning, and green chilies. Mix them well. Reduce the heat to simmer and let it cook for 6-8 minutes.

Then place the taco shells in the baking dish and bake for 5 minutes or until crisp up on each side.

Remove the tacos from the oven and put 1 tablespoon of beans into the bottom of each taco.

Top with the prepared chicken mixture and shredded cheese. Now bake for 5-10 minutes until cheese is melted.

Now remove the taco shells from the oven and top with your favorite toppings such as sour cream, jalapenos, cilantro, salsa, etc.