Spinach and Egg Dumplings

Name: Spinach and Egg Dumplings
Ingredients: 3 ounces spinach (ideally Chinese water spinach; about 2 cups packed); 8 large eggs; 2½ tablespoons skim milk; 1½ teaspoons kosher salt; 2 tablespoons vegetable oil; 1 teaspoon sesame oil; 1 teaspoon oyster sauce; 1 teaspoon freshly ground black pepper; 24 Boiled Dumpling Wrappers