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 and cook for 2 minutes to blend 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 green sauce evenly across the bottom of the prepared baking dish.
07 - Fill each tortilla with about 2 tablespoons of the chicken mixture and a sprinkle of cheese. Roll up tightly and place seam-side down in the dish, arranging them in a single row.
08 - Pour the remaining green sauce evenly over the enchiladas, covering them completely. Sprinkle the remaining Monterey Jack cheese across the top.
09 - Bake uncovered for 25–30 minutes, or until cheese is fully melted and sauce is bubbling around the edges.
10 - Let enchiladas cool for 5 minutes before serving. Top with sour cream, diced avocado, and extra fresh cilantro.