This taco casserole is a super speedy dinner I like to make when it is getting late and I haven't cooked yet. Chili, corn chips, and cheese are topped with lettuce and tomato. Spice it up with your favorite salsa. Vegetarian chili can be found with regular chili — it is often labeled as "fat-free." This recipe can easily be doubled and cooked in a 9x13-inch baking dish.