Prepare all ingredients.

Remove stems from perilla leaves and slice them thinly.

Blanch the ham in hot water for 1 minute, then slice thinly.

Julienne the carrot into thin strips.

Combine ham, perilla leaves, and carrot in a mixing bowl.

Add rice flour to the bowl.

Add oyster sauce to the mixture.

Pour water into the mixture and adjust the batter consistency.

Heat a pan and add a small amount of cooking oil.

Spoon the batter onto the pan and spread it evenly.

Cook until golden brown on both sides.