Mince the onion. Place corn in a microwave-safe container, season with salt and pepper, and top with butter. Add snap pea on top, cover loosely with plastic wrap, and microwave at 600W for 40 seconds. Remove snap pea and cut into quarters.

Heat salad oil in a small frying pan over medium heat. Add minced onion and sauté until softened. Add ground meat and cook until the meat changes color. Add seasonings (sake, ketchup, Worcestershire sauce, salt, and pepper) and stir-fry until the liquid evaporates.