Easy Mexican Chicken Casserole

Name: Easy Mexican Chicken Casserole
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: Mexican
Ingredients: 1 15-ounce can Red Enchilada Sauce (if gluten-free, be sure to use a gluten-free brand); 6 Corn Tortillas (cut into quarters); 1 15-ounce can Black Bean Refried Beans (regular refried beans may be substituted); 1 teaspoon Olive Oil; ¾ cup Red Onion (,chopped); 1 7-ounce can diced Mild Green Chilies (fire roasted if available); 1 15-ounce can Pinto Beans (rinsed and drained (1 ½ cups homemade beans may be used)); 3 cups shredded Rotisserie Chicken; 1 cup Corn Kernels; frozen (canned/drained or fresh may be used); 1 14.5-ounce can Diced Fire Roasted Tomatoes; 1 teaspoon ground Cumin; ½ teaspoon Chile Powder; 1 ½ cups grated Mexican Cheese Blend; thinly sliced iceberg lettuce ribbons; pico de gallo or fresh salsa; guacamole; sour cream; diced fresh cilantro; pickled jalapeno slices