Remove moisture from the tofu with a paper towel, then slice into 1cm thick pieces.
Finely chop the onion and bell pepper.
Place the tofu slices in an oven-safe dish and season with salt and pepper.
Add the chopped vegetables on top of the tofu.
Evenly pour tomato sauce over everything.
Generously add mozzarella cheese on top.
Bake in a preheated oven at 180°C (356°F) for 15 minutes.
Finish by sprinkling parsley on top.