Cut the soft tofu into bite-sized pieces.
Finely chop the onion, bell pepper, and garlic.
Heat olive oil in a pan and sauté the chopped garlic and onion.
Add the minced beef and sauté together.
Add tomato sauce and simmer for 5 minutes.
Place the soft tofu in an oven-safe dish and top with the sautéed ingredients and sauce.
Add mozzarella cheese on top.
Bake in a 200°C oven for 10 minutes.