Cut the soft tofu into appropriate bite-sized pieces.
Slice vegetables such as onion, zucchini, and bell pepper.
Heat olive oil in a pan and sauté the vegetables.
Add tomato sauce, salt, and pepper, and mix well.
Place the soft tofu in an oven-safe dish and top with the sautéed vegetables and sauce.
Sprinkle mozzarella cheese on top.
Bake in a preheated oven at 200°C (392°F) for 15 minutes.
Garnish with parsley to finish.