Slice the tofu into 1cm thick pieces and remove excess water.
Finely chop the onion, bell pepper, and tomato.
Heat olive oil in a pan and sauté the onion and bell pepper.
Add the tomato and season with salt and pepper.
Lay the tofu in an oven-safe dish and top with the sautéed sauce.
Sprinkle mozzarella cheese on top.
Bake in a preheated oven at 180°C for 15 minutes.