Old Bay seasoning (or any crab boil or seafood seasoning)
Yellow mustard (I like Dijon)
Saute green pepper in butter in large skillet. Dissolve flour in milk and add to the pepper. Stir over low heat until a thick paste is formed; set aside. Place crabmeat in a bowl and add seafood seasoning, mustard, 1 tbs mayonnaise, green pepper sauce and blend. Place mixture into small casserole dish. In another bowl, beat the egg and 3 tbs mayonnaise and spoon this over crabmeat mixture. Sprinkle with paprika. Bake at 350 degrees for 20 minutes.