Yakibuta (or Char Siu) is one of my favorite recipes to cook pork. Simply slice thin or cut into cubes and serve with sandwiches, salads, fried rice, ramen or simply on top of plain steamed rice.
It takes some time to marinate meat, but actual kitchen time is minimal.
Just make sure to cook plenty and keep leftovers in fridge, so you can use anytime you want!