3 Cups Uncooked Elbow Macaroni
3 Tablespoons Soft Butter
1 Can Cream of Mushroom Soup
1 Cup Mayonnaise - not Miracle Whip
½ Cup Finely Chopped Onion
1 Medium Jar Pimento
1 Small Can Mushroom Slices/Pieces - Drained
3 Cups Shredded Cheddar Cheese
1 Small Box Cheez-Its - Crushed
Cook 3 cups macaroni in boiling water until almost done.
Drain macaroni and add 3 T butter while macaroni is hot. (This keeps you from having to melt it in the microwave and have it splatter all over the place.)
Add all ingredients except Cheez-Its and stir until well mixed. Put mixture into a buttered 13x9 baking dish. Top with crushed Cheez-Its.
Bake in pre-heated 350 degree oven for 30 minutes.
This is good hot, cold or reheated.