Step 1 - Sour cream shortcrust pastry
Mix the flour with the baking powder and salt and work into crumbs with the butter. Add the remaining ingredients and the rosemary extract and prepare a smooth dough. Leave to rest for approx. 30 minutes. Roll out the dough to the size of a baking tray and place on a baking tray lined with baking paper.
Baking temperature: 170 °C, baking time: approx. 15 minutes
Step 2 - Onion filling
Cut the onions into half rings. Melt the butter in a pan or pot and caramelise the onions for approx. 20 - 25 minutes. Finally, add the nutmeg and salt and leave to cool slightly. Add the eggs and cheese to the onions, mix well and pour onto the pre-baked base, smooth out and bake.
Baking temperature: 170 °C, baking time: approx. 30 - 35 minutes
