01 - Preheat oven to 375°F. Grease a 9x13-inch baking dish with cooking spray or a light coating of oil.
02 - Warm olive oil in a skillet over medium heat. 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 and cook for 2 minutes to combine flavors. Remove from heat.
04 - In a small bowl, combine green enchilada sauce with chopped cilantro and lime juice. Stir thoroughly to incorporate.
05 - Wrap tortillas in a damp paper towel and microwave for 45 seconds. This makes them pliable and prevents cracking during rolling.
06 - Spread 1/2 cup of the prepared sauce evenly across the bottom of the greased baking dish.
07 - Place approximately 2 tablespoons of chicken mixture and a sprinkle of cheese on each tortilla. Roll tightly and place seam-side down in the dish, arranging them in rows.
08 - Pour remaining sauce evenly over the enchiladas, covering the tops. Sprinkle remaining Monterey Jack cheese across the surface.
09 - Bake uncovered for 25–30 minutes until cheese is completely melted and bubbling around the edges.
10 - Let enchiladas rest for 5 minutes before serving. Top with sour cream, diced avocado, and additional fresh cilantro.