Shari's Shredded Chicken Enchiladas

Name: Shari's Shredded Chicken Enchiladas
Prep time: 20 min
Cook time: 40 min
Total time: 1 h
Cuisine: Mexican, Latin American, American
Ingredients: cooking spray; 1 cup sour cream; 1 cup green salsa (such as Frontera® Tomatillo); 2 teaspoons olive oil; 1 small onion, chopped; 2 cloves garlic, minced; 3 cups shredded cooked chicken breasts; 1 ½ cups shredded Mexican cheese blend, divided; 1 (4 ounce) can chopped green chile peppers; 8 (8 inch) flour tortillas