Perkedel kentang (Potato cakes)

Name: Perkedel kentang (Potato cakes)
Prep time: 45 min
Cook time: 45 min
Total time: 45 min
Yield: 4 porsi
Ingredients: 1000 g kentang; 150 g bawang bombai; 1 sdm jus lemon; 1 sdt garam; ¼ sdt bubuk lada hitam; 20 g maizena; 20 g havermut (oat flake); 1 telur; minyak goreng