Wash the sweet pumpkin thoroughly and remove the skin and seeds.
Boil or steam the sweet pumpkin.
Mash the cooked pumpkin and season lightly with a pinch of salt.
Boil the eggs, peel them, and chop them up.
Mix the eggs with mayonnaise and salt to make the sandwich filling.
Place the mashed pumpkin and egg filling on the bread slices to make the sandwich.
Slice into bite-sized pieces.