I usually chill the mashed potatoes overnight the night before hand. You can't make this with warm mashed potatoes.
1) Toast bread until it is toasted all the way through. Tear bread apart into crouton sized pieces and add to the mashed potatoes. Mix well and add more bread if needed. I prefer a one to one ratio of bread to mashed potatoes but my mom makes it was a little less bread.
2) On a clean, floured surface, take mixture and make 4 to 6 patties, depending on how big you want it to be. The patties should be no more then an inch thick. Dust the patties with flour.
3) In a frying pan, melt about 2 tablespoons of vegan butter. Once pan is well coated add patties and sprinkle with salt, onion powder, and garlic powder. Fry patties until medium golden brown then flip over and repeat with another dab of butter.
I like to put ketchup on it and serve with OJ, peaches, and vegan bacon.
Source of recipe: mom gave me this recipe