Yields 40-50 servings.

3 pounds ground beef
3 envelopes taco seasoning mix
3 heads lettuce, shredded
3 cups (12 ounces) shredded Cheddar cheese
3 cups chopped tomatoes
2 cups chopped onion
3 (4 1/4 ounce) cans chopped or sliced ripe olives, drained
2 (15 ounce) cans ranch or chili beans, drained
1 (16 ounce) bag corn chips
1 (16 ounce) bottle Catalina salad dressing
1 (12 ounce) jar salsa

Brown beef; drain. Add taco seasoning and prepare according to package directions. Cool. Toss with remaining ingredients in a large unscented plastic trash bag (or other large container).