Cut the soft tofu into bite-sized pieces and remove excess moisture.
Slice vegetables like onion, bell pepper, and broccoli into pieces suitable for eating.
Sauté onion and bell pepper in a pan with olive oil.
When the veggies are halfway cooked, add the soft tofu and broccoli, and stir-fry lightly.
Season with salt and pepper.
Transfer the stir-fried ingredients into a gratin dish and add cheese on top.
Bake in a preheated oven at 180°C for 10 minutes until the cheese melts.