
First, prepare the marinade. In a bowl, mix the mustard, soy sauce, vegetable oil and pepper. I don't usually add salt, marinade to the marinades with soy sauce and so it turns out salty. But if you still want to add salt, then in a small amount, otherwise you risk salting. In addition to these spices, you can add your own to taste: pork spices, dry garlic, etc.