Given the task definition and input, reply with output. In this task, you will be presented with the directions of a recipe separated by "," and have to fill in the "___" which is a step that is missing from the recipe.

Use your favorite part of pork.,I used the trimmings.,Slice an onion thinly.,Heat oil in a preheated pan, and sweat the onions.,When onions soften, add the mirin, soy sauce and sugar.,Fry over medium heat.,Add the meat immediately afterwards.,______,Put it on rice and it's done.,It goes well with eggs.,You can also put sesame seeds or green onions to garnish.
Fry until the sauce is boiled down a little and the meat has cooked through.