My memories on the origin of this recipe are a bit fuzzy, but my mom has been making it at least as long as I've been alive. My mom was never a tuna noodle casserole fan so she experimented with alternatives and spam casserole was born. Ever since I was a kid, this was one of those dishes that made everything better if I was having a bad day.
1 can spam
1 can condensed cream of mushroom soup
2 slices of American cheese
2 tbsp milk
1/4 cup mayo
3 cups macaroni, cooked and drained
While you're cooking the macaroni on the stove, combine the spam, cream of mushroom soup, cheese, milk, and mayo in your food processor and pulse away until the spam is chopped up into small chunks. If you lack a food processor just chop the spam with your knife and mix everything in a bowl. When the macaroni is done, drain it and add it immediately to a bowl with the spam mixture and mix everything together. Put this into a lightly greased microwave-safe baking dish and top it with your favorite crushed potato chips. I'm a fan of regular Lay's myself, but some people prefer wavy chips on top. Put your dish in the microwave and cook it uncovered for 10 minutes.