Pork Egg Rolls

soy sauce

rice vinegar or white wine vinegar

light brown sugar

Vegetable oil, for frying

cabbage coleslaw mix

carrots, coarsely grated (optional)

garlic cloves, minced

grated fresh ginger

Coarse salt and ground pepper

ground pork

scallions, thinly sliced

egg-roll wrappers (6 to 7 inches square)

large egg, lightly beaten

Sweet-and-sour sauce and Chinese hot mustard, for serving