8 oz. thin spaghetti
2 tbsp. butter
1 med. onion, chopped
8 oz. med. shrimp, cleaned
6 oz. sliced fresh mushrooms
1/4 c. mayonnaise (not salad dressing)
1/4 c. flour
1 tsp. salt
2 c. milk
1/4 c. sherry or white wine
1/4 c. Parmesan cheese

Cook spaghetti according to package directions. Drain. In a large skillet, melt butter; add onion and saute until tender. Stir in shrimp and mushrooms. Cook 5 minutes, stirring frequently. Remove from pan. Mix mayonnaise, flour and salt in pan. Gradually stir in milk and sherry. Bring to a boil 1 minute. Toss with spaghetti. Layer in 2 quart casserole dish alternately with shrimp mixture. Top with cheese. Bake at 350 degrees for 20 to 25 minutes.