Heat a medium pot or earthenware pot (ttukbaegi) over medium high heat. See Note 3. Add the vegetable oil, kimchi, onions, Korean red pepper flakes, and garlic. Add your choice of protein if using. Stir fry until protein is almost cooked and onions softened, about 3 to 4 minutes.
⅓ cup kimchi, ¼ cup onions, 2 Tablespoons Korean red pepper flakes, 3 cloves garlic, 2 teaspoons vegetable oil, ½ cup protein of choice - shrimp, chicken, beef, pork