Slice the eggplant and vegetables thinly.
Drain the soft tofu and cut it into bite-sized pieces.
Heat olive oil in a pan and sauté the onion and garlic.
Add ground beef and eggplant, and stir-fry.
Pour in the tomato sauce and bring to a simmer.
Layer the soft tofu and sautéed mixture in an oven-safe dish.
Top with mozzarella cheese.
Bake in a 200°C oven for 15 minutes.