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 the soft tofu to the sautéed vegetables and season lightly with salt and pepper.
Transfer the mixture to a gratin dish and spread the pizza cheese evenly on top.
Bake in the oven or air fryer at 180°C for 8–10 minutes until the cheese melts.