Pan-fry the frozen dumplings in a skillet with enough oil until golden brown, then set aside.

In another skillet, heat 1 tbsp of oil and sauté chopped onion, sliced green onion, and chili powder until fragrant.

Add chopped green chili, red chili, sugar, soy sauce, vinegar, oyster sauce, and water. Bring the mixture to a boil.

Once boiling, add the fried dumplings and stir quickly to coat them evenly with the sauce. Turn off the heat.