Potato Pancakes
["4 large potatoes (about 1 1/4 lb.), peeled", "1 medium onion (optional)", "1 egg", "1 tsp. salt", "1/4 tsp. white pepper", "2 Tbsp. flour", "1/2 tsp. baking powder", "about 1/2 c. oil for frying"]
["Grate the potatoes and onions (if you are using them) with the grating disk of food processor or using the large holes of a hand-held grater.", "Transfer the potatoes and onions to a colander. Squeeze mixture to press out as much liquid as possible. Transfer to bowl.", "Mix in the egg, salt, pepper, flour and baking powder."]
["potatoes", "onion", "egg", "salt", "white pepper", "flour", "baking powder", "oil"]