01 - Preheat oven to 375°F. Grease a 9x13-inch baking dish with cooking spray or oil.
02 - Warm olive oil in a skillet over medium heat. Add onion and cook 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 until well incorporated.
05 - Wrap corn tortillas in a damp paper towel. Microwave for 45 seconds to make them pliable and prevent cracking.
06 - Spread 1/2 cup of the green sauce mixture evenly across the bottom of the prepared baking dish.
07 - Place about 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 all enchiladas. Sprinkle remaining Monterey Jack cheese across the top.
09 - Bake uncovered for 25-30 minutes until cheese is melted, bubbly, and beginning to turn golden brown.
10 - Let enchiladas rest for 5 minutes before serving. Top with sour cream, diced avocado, and extra cilantro.