Cut the tofu into bite-sized pieces.
Chop the onion, bell pepper, and broccoli.
Heat olive oil in a pan and sauté the onion, bell pepper, and broccoli.
Place the sautéed vegetables and tofu in an oven-safe dish.
Evenly sprinkle tomato sauce and cheese on top.
Bake in a preheated oven at 180°C (356°F) for 15 minutes until done.