Step 1

In a medium bowl, combine mayonnaise, sour cream, garlic powder, salt, and black pepper; mix well.

Step 2

In a large glass bowl (see Note), layer half the lettuce, then half the bell pepper, onion, corn, celery, mayonnaise mixture, and cheese. Repeat layers once more, then top with bacon bits.

Step 3

Cover and chill at least 1 hour before serving. Toss just before serving.