Emily's Excellent Taco Casserole

"This 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 the regular chili - it is often labeled as 'fat free'. This recipe can easily be doubled, and cooked in a 9x13 inch baking dish."