Remove the skin and seeds from the sweet pumpkin and cut it into cubes.
Cut the chicken breast into bite-sized pieces.
Drain the tofu and cut it into large pieces.
Heat olive oil in a pan and stir-fry the sweet pumpkin.
When the sweet pumpkin is cooked, add the chicken breast and stir-fry together.
When the ingredients are cooked, add the tofu and mix.
Season with salt and pepper.
Transfer everything to a gratin dish and top with mozzarella cheese.
Bake in a preheated oven at 180°C for 10 minutes.