Cubed tofu (saute in onion or garlic or whatever you wish. It absorbs the flavor of whatever it is cooked with.)
Eggs
Onion
Potatoes
Carrots
Matzoh meal

Grate the onions, carrots and potatoes. Mix together with eggs and cubed tofu. Form into bulbous croquette shapes. Coat with matzoh meal (or else mix the matzoh meal in.) Fry quickly in vegetable oil about 8 minutes. Bake in a hot oven for about 15 minutes.