Preheat the oven to 180 ° C top / bottom heat Roll out the puff pastry and place in the greased baking dish.
Mix the sour cream and eggs in a large bowl. Wash, core and cut the bell peppers. Cut the spring onions into rings and the mushrooms into slices and add to the egg-sour cream mixture with the bell pepper. Season with salt, pepper and broth to taste. Put the mixture on the puff pastry and sprinkle with grated cheese. Bake the quiche in the preheated oven for about 20-30 minutes.
Alternatively, corn, tomatoes, zucchini, chopped meat or spinach can be used as a topping.