1 (8 oz.) pkg. shredded cheddar cheese
1 c. mayonnaise
3 tbsp. finely chopped onion
6 strips bacon, cooked until crisp & crumbled
1 loaf round crusty bread (optional)

Combine all ingredients and bake in oven (or microwave) at 350 degrees until cheese is melted, about 20 to 30 minutes. Serve immediately in hollowed loaf of bread with bread chunks or on crackers.