Cut the soft tofu into bite-sized pieces.
Finely chop the onion and bell pepper.
Heat olive oil in a pan and sauté the onion and bell pepper.
Add tomato sauce and mix well, simmering until slightly thickened.
Add the soft tofu and mix gently with the sauce.
Top with cheese and bake in a preheated oven at 200°C for 10 minutes.