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 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 thoroughly and cook for 2 minutes to combine flavors. Remove from heat.
04 - Combine green enchilada sauce with chopped cilantro and lime juice in a small bowl. Mix well to incorporate.
05 - Wrap corn tortillas in damp paper towels. Microwave on high for 45 seconds to make pliable for rolling.
06 - Spread 1/2 cup of the green sauce evenly over 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 in rows.
08 - Pour remaining sauce evenly over the enchiladas. Sprinkle remaining cheese across the top.
09 - Bake uncovered for 25–30 minutes until cheese is completely melted and bubbly around the edges.
10 - Let cool for 5 minutes to set. Top with sour cream, diced avocado, and extra cilantro before serving.