Cut the soft tofu into bite-sized pieces.
Slice the onion and bell pepper thinly.
Heat olive oil in a pan and sauté the onion and bell pepper.
Pour in the tomato sauce and bring to a simmer.
Add the soft tofu and simmer with the sauce for 2-3 minutes.
Transfer the tofu and sauce to an oven-safe dish and top with mozzarella cheese.
Bake in a preheated oven at 200°C for 10 minutes until the cheese melts.
Sprinkle with parsley powder to finish.