Good-Cooking - Salt River Nachos

Ingredients

• 1 pound ground beef
• 1 large onion, chopped
• 1 (15 ounce) can refried beans
• 1 pound sharp Cheddar cheese, grated
• 1 (8 ounce) bottle taco sauce, mild or hot
• 1/2 head lettuce, shredded
• 2 cups sour cream
• 1 1/2 cups guacamole
• 1 small can chopped ripe olives