lumpia recipe

1 pound ground pork (or a mix of ground pork and ground beef) - 1 cup finely chopped shrimp (optional) - 1 cup carrots, finely grated - 1 cup cabbage, finely shredded - 1 small onion, finely chopped - 3 cloves garlic, minced - 1/2 cup green onions, finely chopped - 1/4 cup soy sauce - 1 tablespoon fish sauce (optional) - 1 teaspoon black pepper - 1 teaspoon salt - 1 teaspoon sugar