Green Chile Enchilada Casserole

Ingredients

• 2 tablespoons salted butter
• 1 onion, diced
• 1 (15-ounce) can green enchilada sauce
• 1 (7-ounce) can chopped green chiles
• 1 tablespoon adobo sauce
• 13 corn tortillas
• 4 cups cheddar jack cheese, grated
• 1 (10-ounce) package frozen corn, thawed and patted dry
• 1 (15-ounce) can refried beans
• pico de gallo, for topping (optional)
• cilantro, chopped, for topping (optional)