If you have pork, then just add leftover vegetables into the soup. It's an easy, yummy nutritious soup!
I've always been making pork miso soup this way.
You can use Chinese cabbage, sweet potato, burdock, young green scallion, konnyaku and shirataki as well.This is just a standard amount, so feel free to modify the amount and seasonings as you like.
Enjoy Japanese food around the world.