Perfect Potstickers

Name: Perfect Potstickers
Ingredients: 1/2 pound ground pork; 1/4 cup finely chopped scallions; 2 tablespoons finely chopped red bell pepper; 1 egg, lightly beaten; 2 teaspoons ketchup; 1 teaspoon yellow mustard; 2 teaspoons Worcestershire sauce; 1 teaspoon light brown sugar; 1 1/2 teaspoons kosher salt; 1/2 teaspoon freshly ground black pepper; 1/4 teaspoon cayenne pepper; 35 to 40 small wonton wrappers; Water, for sealing wontons; 3 to 4 tablespoons vegetable oil, for frying; 1 1/3 cups chicken stock, divided