Heat milk and water lukewarm, mix flour with dry yeast and salt, add butter and liquid. Use the dough hook to make a smooth dough. Cover and let the dough rise in a warm place for 30 minutes.
Meanwhile, pluck 6 to 8 tender leaves from the kohlrabi. Then peel the kohlrabi and cut or slice it into very thin slices, I always grate them roughly. Peel and cut the onion. Braise both a little.
Then mash the blue cheese with a fork and mix with the yogurt. Stir in eggs, salt and pepper. Mix this mixture with the steamed kohlrabi.
Now distribute the dough in a greased 28 cm springform pan and press a 3 cm high edge onto it. Pour in the kohlrabi mixture and distribute it evenly. Bake at 200 degrees in a preheated oven with top and bottom heat, or 180 degrees with convection and without preheating, for 40 minutes.
Allow to cool slightly. Also tastes very good cold.