Preheat the Oven: Set your oven temperature to 375°F (190°C).
Sauté the Veggies: In a medium skillet over medium heat, warm the olive oil. Add the diced red bell pepper and finely chopped onion, stirring occasionally until they soften, about 5 minutes.
Combine Filling Ingredients: In a large mixing bowl, combine the shredded chicken, sautéed bell pepper and onion, half of the shredded cheese, ground cumin, garlic powder, and season with salt and pepper. Mix until well incorporated.
Prepare Tortillas: Warm the corn tortillas in a microwave-safe dish for about 20 seconds to make them flexible.
Assemble the Enchiladas: Spread a thin layer of enchilada sauce on the base of a baking dish. Take one warmed tortilla, add a spoonful of the chicken mixture, and roll it up tightly. Place seam side down in the baking dish. Repeat for remaining tortillas.
Add Remaining Sauce: Pour the leftover enchilada sauce evenly over the top of the enchiladas. Sprinkle the remaining shredded cheese across the surface.
Bake: Cover the baking dish with foil and bake for 20 minutes. Remove the foil and bake for an additional 10 minutes, until the cheese is bubbling and golden.
Garnish and Serve: Let the enchiladas cool slightly before serving, garnished with fresh chopped cilantro and avocado slices.
Notes
Feel free to customize the filling with your favorite ingredients.