Preheat oven to 350 degrees F.
In a large mixing bowl, mix the mayonnaise, sour cream and egg together. Add remaining ingredients, except for crab and mix until thoroughly blended. Gently fold in the crab meat.
Place in a 1 1 /2-quart buttered baking dish and bake 20-25 minutes, until bubbly.
Serve with crackers, French bread croutons, or herbed pita triangles.
Yield: 1 quart