2 loaves unsliced Italian bread
1 c. mayonnaise
1 c. grated Cheddar cheese
1 c. crabmeat
1 c. chopped onions

Hollow out one loaf of bread; break or cut the inner bread and entire second loaf into bite sized pieces. Combine remaining ingredients in baking dish. (May be done ahead to this point and refrigerated.) Bake at 350 degrees for 20-30 minutes and pour into hollowed out bread. Serve surrounded with bread pieces for dipping.