Mix the flour with baking powder and mix together with the other dough ingredients to form a smooth dough. Grease a springform pan or line it with parchment paper and distribute the dough in it, pressing down on a high edge.
Finely dice the pumpkin or coarsely grate it, dice the onion and cut the spring onions into thin rings.
Heat the oil in a pan and simmer the vegetables in it over medium heat for 5-8 minutes. Season to taste with salt, pepper, curry and nutmeg. Add pumpkin seed oil, mix well and let cool a little.
Whisk the ingredients for the glaze together well and mix with the vegetables. Then spread the mixture on the dough.
Bake in a preheated oven at 180 ° C (convection) for about 25 minutes.
The quiche tastes delicious the next day even when cold.