Cut the potatoes into bite-sized pieces, and transfer into a bowl. Cover with plastic wrap, and microwave for 3 minutes.
They should be ready when you can easily push a toothpick through them! Mix with the mayonnaise, and season with salt and pepper. Spread the meat sauce on top, sprinkle with cheese, and bake in an oven!
When the surface has browned, it's done!
Story Behind this Recipe
Since I had leftover meat sauce and potatoes on hand, I made a gratin with them.
Coating the potatoes with mayonnaise prevents the food from sticking to the dish, so it will be easy to wash. Also, it makes the dish more enjoyable, so I recommend it.