Sweet and Sour Curry Spring Rolls

Name: Sweet and Sour Curry Spring Rolls
Ingredients: 1 pound shrimp; 1 pound minced turkey or minced pork; 8 scallions; 1 red pepper; 4 ounces Chinese mushrooms, soaked in water 20 minutes; 1 small piece ginger; 8-ounce can water chestnuts; 1/2 Chinese medium sized cabbage; 1 tablespoon dry sherry; 3/4 tablespoon white vinegar; 1 tablespoons soy sauce; 1 teaspoon sugar; 1/2 teaspoon salt; 1 1/2 teaspoons curry powder, or to taste; 2 teaspoons molasses; 1/2 teaspoon chili powder, or Chinese chili paste (optional); 1 tablespoon oil; Oil, for deep frying; 100 spring roll wrappers; 2 tablespoons cornflour; 1 bowl of water, half full; 1 damp clean hand or kitchen towel