Cut the tofu and enoki mushrooms into bite-sized pieces.
Julienne the onion and green onion.
Heat some cooking oil in a pan over medium heat.
Add the tofu and grill both sides until golden brown.
Add the onion, green onion, and enoki mushrooms to the tofu and stir-fry.
Season with soy sauce, salt, and pepper.
Once all ingredients are cooked, drizzle with sesame oil to finish.