Wash the pumpkin thoroughly, peel it, and cut it into small pieces.
Steam the pumpkin pieces until soft.
Place the cooled pumpkin in a bowl and mash it until smooth.
Add eggs, milk, and sugar to the mashed pumpkin and mix well.
Evenly fill the tart molds with the batter.
Bake in a preheated oven at 180°C (356°F) for 20~25 minutes.