Bread Bowl With Dip
["1 round bread (unsliced; 1 lb.; sourdough is great)", "1 3/4 c. sour cream", "1 3/4 c. mayonnaise", "3/4 shredded Cheddar cheese", "1/4 lb. each: pastrami, ham and corned beef, finely chopped", "3 Tbsp. finely chopped onion", "2 tsp. onion powder", "2 tsp. celery seed"]
["Hollow out bread; save bread."]
["bread", "sour cream", "mayonnaise", "Cheddar cheese", "beef", "onion", "onion powder", "celery"]