Mix ground pork, garlic, green onions, ginger, rice vinegar, soy sauce, chili garlic sauce, and sesame oil together using your hands until the ingredients are evenly distributed.
Place 1-2 teaspoons of pork mixture into wonton wrappers, combine cornstarch and 1/3 cup cold water to make a slurry, and gather the edges up over the meat to make a bundle.
Preheat oil and water in a large nonstick skillet over medium high heat until the water is simmering. Add the dumplings in a single layer, cover, and steam for 3 minutes or until the water evaporates. Uncover and let brown on the bottom.