First you take a nice big potato (baked or boiled). Next you take any topping you can think of, and mash them all together.
My preferences are:
Browned Hamburger with cheddar cheese soup mixed in
green onions
black olives
sesame seeds
cottage cheese
broccoli bits
salsa or ranch dressing
raisins
Basically you can use anything you can think of for toppings. It looks quite gross on your plate, but tastes wonderful.