Cut the tofu into bite-sized pieces.
Chop the onion and bell pepper.
Heat olive oil in a pan and sauté the onion and bell pepper.
Add the tofu and season with a little salt and pepper.
Pour the tomato sauce over and simmer briefly.
Transfer to an oven-safe dish and top with cheese.
Bake in the oven at 180°C for 10 minutes until done.