Cheesy Vegetarian Enchilada Casserole

Ingredients (7)

• + cooking spray add to pantry
• + 10 (6 inch) corn tortillas, cut into quarters add to pantry
• + 1 (8 ounce) package sharp Cheddar cheese, cubed add to pantry
• + 1 onion, chopped add to pantry
• + 1 (3.8 ounce) can sliced black olives add to pantry
• + 1 (16 ounce) can green chile enchilada sauce add to pantry
• ✓ 2 cups shredded Mexican cheese blend