1make cream sauce from first five ingredients. stir in cheese, salt and pepper and celery. Cook over low heat until cheese melts. after cheese is melted, remove from stove and cool for 15 to 20 minutes. Stir in mayonaise and chopped parsley. Then add the shrimp and scollops and top with crumbled bacon and sour cream potato chips. Back 325 degrees for 30 minutes.