1lb / 500g potato, about two large (Note 1)
2½ tbsp oil
8oz / 250g sausage, remove from casings (the best quality you can afford)
¾ cup grated cheddar cheese (or any other melting cheese, but not mozzarella)
½ cup sliced scallions/shallots (green and white part)
1 egg
¼ cup flour
Pepper