Spray twenty-four 1-3/4-inch muffin cups with nonstick coating. Place a wonton wrapper in each, shaping it into a cup. Bake in a 375 degree F oven about 8 minutes or until lightly browned; cool. Keep in an airtight container at room temperature for up to 1 day.
For filling, cook cabbage, peas, green onion, bean sprouts, sweet pepper, and garlic in sesame oil for 2 to 4 minutes or until peas are crisp-tender and cabbage has wilted. Remove from heat; drain any liquid. Stir in water chestnuts, cilantro, hoisin or plum sauce, soy sauce, honey, vinegar, dry mustard, and ginger. Cover and refrigerate for 2 to 6 hours.
To assemble, use a slotted spoon to fill cups with vegetable mixture. Top with fresh chives, if desired. Serve within 2 hours. Makes 24 appetizers.