Mix all ingredients, except crabmeat, together with mixer until well blended. Add crabmeat and gently stir together with a spoon. Put in a 13x9 casserole dish that has been sprayed with Pam. Top with remaining cheddar cheese and few shakes of Old Bay. Bake at 350 for about 30 - 35 minutes. Serve with hot italian bread or crackers.