Zwiebelkuchen

Instructions

1. 1 Make dough by combining flour, yeast, warm milk, softened butter, and salt. Knead until smooth and let rise thirty minutes covered.
2. 2 Cook sliced onions slowly in butter over medium-low heat for twenty-five minutes, stirring occasionally, until deeply golden and sweet.
3. 3 Whisk together eggs, sour cream, cream, caraway seeds, salt, pepper, and nutmeg to make the custard filling.
4. 4 Roll out dough and press into a greased tart pan, forming a slight rim around the edges to contain the filling.
5. 5 Spread caramelized onions evenly over the dough. Pour the egg and cream mixture over the onions, ensuring even distribution.
6. 6 Bake at 190 degrees for thirty-five minutes until the custard is set and golden brown on top. Let cool slightly before slicing.