Cut the tofu into 2cm thick slices.
Finely chop the onion and bell pepper.
Heat olive oil in a pan and sauté the onion and bell pepper.
Add the tofu to the pan and grill until slightly golden.
Place the sautéed vegetables and tomato sauce over the grilled tofu.
Sprinkle cheese on top and bake in an oven or air fryer at 200°C for 10 minutes.