01 - Preheat oven to 375°F. Lightly grease a 9x13-inch baking dish with cooking spray or oil.
02 - Warm olive oil in a skillet over medium heat. Add chopped onion and sauté for 3–4 minutes until translucent. Stir in minced garlic, cumin, and oregano; cook for 1 minute until fragrant.
03 - Add shredded chicken to the skillet along with salt and pepper. Mix thoroughly to combine with the aromatic mixture. Cook for 2 minutes to heat through and meld flavors. Remove from heat.
04 - In a small bowl, combine green enchilada sauce with chopped cilantro and lime juice. Stir well to incorporate the fresh ingredients.
05 - Wrap corn tortillas in a damp paper towel and microwave for 45 seconds. This step prevents cracking during rolling.
06 - Spread 1/2 cup of the prepared sauce evenly across the bottom of the greased baking dish.
07 - Fill each softened tortilla with approximately 2 tablespoons of the chicken mixture and a sprinkle of cheese. Roll tightly and place seam-side down in the baking dish, arranging them in rows.
08 - Pour the remaining sauce evenly over all the enchiladas, ensuring complete coverage. Sprinkle the remaining Monterey Jack cheese across the top.
09 - Bake uncovered for 25–30 minutes until the cheese is fully melted and bubbling, with lightly browned edges.
10 - Let the enchiladas rest for 5 minutes before serving to allow the filling to set. Top with sour cream, diced avocado, and additional fresh cilantro.