• 2 Tbsp butter
• 1 medium onion, chopped
• 8 oz shrimp
• 8 oz mushrooms
• ¼ cup flour
• ¼ cup mayo
• 1 tsp salt
• 2 cups milk
• 8 oz spaghetti
• Parmesan cheese, grated

Melt butter in skillet, sauté until tender. Add shrimp and mushrooms. Cook for 5 minutes, stirring often.

Remove from skillet.

Mix next 3 ingredients in skillet, add milk. Cook until thickened.

Toss with shrimp and cooked spaghetti.

Turn into 2½ qt casserole.

Top with cheese.

Bake at 350º for 30 minutes.