01 - Preheat oven to 375°F. Grease a 9x13-inch baking dish with cooking spray or a small amount of oil.
02 - In a skillet over medium heat, warm olive oil. Add onion and sauté 3-4 minutes until translucent. Stir in garlic, cumin, and oregano; cook 1 minute until fragrant.
03 - Add shredded chicken, salt, and pepper to the skillet. Mix well to combine with the seasoned aromatics and cook for 2 minutes. Remove from heat.
04 - In a small bowl, combine green enchilada sauce with chopped cilantro and lime juice. Mix thoroughly.
05 - Wrap corn tortillas in a damp paper towel and microwave for 45 seconds. This 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 small portion of cheese. Roll tightly and place seam-side down in the dish, arranging them in a single row.
08 - Pour remaining sauce evenly over the filled enchiladas. Sprinkle the remaining Monterey Jack cheese across the top.
09 - Bake uncovered for 25-30 minutes until the cheese is fully melted and bubbly with lightly browned edges.
10 - Let the enchiladas cool for 5 minutes to set. Serve warm topped with sour cream, diced avocado, and additional fresh cilantro.