Crumble the yeast, mix with lukewarm milk and let rise for a few minutes. Sift the flour. Then add the butter in flakes. Pour in the yeast-milk mixture and knead everything into a dough. Let rise to double volume in a warm place.
Cut the bacon and onions into strips and sweat in lard until translucent. Let cool down. Mix in the salt, pepper and caraway seeds. Mix the cream with the eggs.
Press the dough into a springform pan and pour the cooled bacon and onion mixture onto the dough, pour the cream and egg mixture over it.