Dice the tofu and remove excess moisture.
Finely chop the onion and bell pepper.
Drain the oil from the canned tuna.
Add a little olive oil to a pan and sauté the onion and bell pepper.
Add the tofu and tuna, then season with salt and pepper.
Place the sautéed mixture into an oven-safe dish.
Evenly spread mozzarella cheese on top.
Bake in a preheated oven at 200°C for 10-15 minutes until the cheese is golden brown.