Thinly slice the cabbage.
Chop the onion.
Cut the soft tofu into bite-sized pieces.
Heat olive oil in a pan and sauté the onion and cabbage.
Season with salt and pepper.
Place the sautéed vegetables and soft tofu in an oven-safe dish.
Top with mozzarella cheese.
Bake in the oven at 200°C (392°F) for 10 minutes.