Wash the kabocha thoroughly, remove the seeds, and slice it into 2–3cm thick pieces.
Place the kabocha slices in a steamer and steam for 8 to 10 minutes.
Transfer the steamed kabocha to a bowl and hollow out the center.
Crack an egg into the hollowed center.
Mix milk with salt and black pepper, then pour it over the egg.
Top with mozzarella cheese.
Microwave for 3 to 4 minutes.
Garnish with parsley.