01 - Preheat oven to 375°F. Grease a 9x13-inch baking dish with cooking spray or a small amount of oil.
02 - Warm olive oil in a skillet over medium heat. Add onion and cook for 3-4 minutes until translucent. Add garlic, cumin, and oregano; cook for 1 minute until fragrant.
03 - Add shredded chicken to the skillet. Season with salt and pepper. Mix thoroughly and cook for 2 minutes to combine flavors. Remove from heat.
04 - Whisk together green enchilada sauce, chopped cilantro, and lime juice in a small bowl until well combined.
05 - Wrap corn tortillas in damp paper towels. Microwave for 45 seconds until pliable and easy to roll.
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 baking dish.
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 completely melted and bubbly around the edges.
10 - Let enchiladas rest for 5 minutes before serving. Top with sour cream, diced avocado, and extra cilantro.