Wash the pumpkin thoroughly with the skin on and cut it into bite-sized pieces.
Steam the pumpkin in boiling water for 10 minutes.
Peel the boiled eggs and roughly mash them.
Mash the steamed pumpkin as well.
Place the mashed pumpkin and eggs in a bowl, add mayonnaise, salt, and pepper, and mix well.
Transfer to a plate and serve.