Linda's Hot Crab Dip

16 oz. soft cream cheese
8 oz. sour cream
4 T. mayonnaise
1/2 t. lemon juice
1 t. dry mustard
1/8 t. garlic salt
1 # backfin crabmeat
4 oz. shredded cheddar cheese
paprika

Blend all ingredients except crab and 1/2 cheese in a blender. Fold in crab and pour into casserole dish. Bake at 325 for 45 minutes. Remove from oven, top with cheese and sprinkle paprika. Serve with mild crackers.