Stir fry ground pork over medium heat in a pan until it changes color. Add onion, Japanese leek and cook until wilted. Add eggplants and keep stir frying until cooked.
Pour the miso sauce and cook until the flavor blended and the liquid is almost gone. Season with salt and pepper (optional)
Arrange them on the plate and sprinkle cheese on top and toast in the toaster until it becomes golden brown.