In a wide bowl, put 1 bowl of cold rice, crack 2 eggs, and add 2 tbsp of cooking oil. Mix thoroughly so each grain is coated and not clumpy.
While the mandu are still frozen, use scissors (instead of a knife and cutting board) to roughly chop them into small pieces, crushing the wrapper and filling together.
Place a dry frying pan (no oil) over high heat and preheat for about 1 minute until very hot.
Pour the egg-coated rice into the hot pan. Use chopsticks to break up any clumps and stir-fry as if scattering the rice.
Keep stir-frying constantly for at least 3 minutes until the rice loses moisture and each grain becomes fluffy and separates easily.
Add a little oyster sauce or chicken stock (or seasoned salt if you don't have either) for umami, then add the chopped mandu. Stir-fry gently just until the mandu are heated through, then finish.
Pre-coat cold rice with egg and oil so each grain is thinly coated.
Pour the coated rice into a dry pan and stir-fry with chopsticks, breaking it apart until fluffy and dry.
Season lightly with oyster sauce, then add scissors-chopped mandu and stir-fry briefly until warm.
Cooking tips 💡
The rice must be cold and never microwaved beforehand so the egg and oil coat the surface and prevent a sticky, mushy fried rice.
Since oil is already added when mixing the rice, do not add extra oil to the pan, or the rice will become greasy and heavy.
Most commercial frozen mandu are pre-steamed during production, so they only need to be warmed through in the final step to be safe to eat.