Shred potatoes and apple in a food processor, in batches if necessary. Combine shredded potatoes and apple in a bowl with flour and salt. Dough should be thick and not loose.
Heat oil in a skillet over medium-high heat. Add heaping tablespoons of the dough and flatten slightly. Cook until golden, 2 to 3 minutes. Flip and brown the other side, 1 to 2 minutes more. Repeat with remaining dough. Sprinkle sugar on top of latkes.
We have determined the nutritional value of oil for frying based on a retention value of 10% after cooking. Amount will vary depending on cooking time and temperature, ingredient density, and specific type of oil used.
Per Serving: 239 calories;2.2 g fat;
51 g carbohydrates;
5.7 g protein;
0 mg cholesterol;
55 mg sodium.