Remove the skin and seeds from the pumpkin and cut into bite-sized pieces.
Dice the chicken breast.
Drain the tofu and cut into cubes.
Steam the pumpkin in a steamer for 10 minutes.
Add olive oil to a pan and sauté the chicken breast.
Add the cooked pumpkin and tofu to the pan and gently mix.
Transfer all ingredients to a baking dish and season with salt and pepper.
Top with mozzarella cheese.
Bake in a preheated oven at 180°C (356°F) for 10-15 minutes.