Cook dumplings according to package directions until fully cooked.
In a heatproof bowl, add garlic, chili flakes, sesame seeds, cilantro, sugar, green onion, rice vinegar, sesame oil, and soy sauce.
Pour the hot avocado oil over the ingredients to bloom the flavors, then stir well.
Add the boiled dumplings to the bowl and toss until coated in the spicy garlic chili oil sauce.
Garnish with extra green onions and sesame seeds if desired.