Combine the cheese, onion and milk in a saucepan; stir over low heat until the cheese is melted.
Cover a serving platter with tortilla chips; top with lettuce, tomato, olives and the cheese sauce.
Notes
Makes 4-6 servings.Microwave: Combine cheese, onion and milk in a 1 1/2 qt casserole or bowl. Microwave on medium for 6 minutes or until thoroughly heated, stirring every 2 minutes.