Add the pork offcuts and marinade sauce into a bowl and rub the sauce into the meat. Leave to rest for a while. Wash the mizuna, drain, and cut into bite-sized pieces.
Heat a frying pan and add vegetable oil. Add the meat from Step 1 and stir-fry.
Arrange the mizuna on a serving plate, and place the meat on top. (You can use thinly sliced cabbage instead of mizuna if you like.)
This is a recipe with a similar flavor, made with chicken thigh: "Sautéed Chicken Thighs with My Special Sauce" (Recipe ID: 2199836).
Story Behind this Recipe
I often buy pork offcuts and I wanted to prepare them in the style of yakiniku.
The flavor is on the sweet side. Adjust the shichimi spice according to your taste. (I think it's best not to add any if making this for children.) After marinating the meat in the sauce in Step 1, you can divide the meat into smaller portions, wrap and put them in the freezer. Then you can use them for bentos after thawing them and frying.