Fry the onion cubes in the butter until translucent. Add zucchini cubes and fry. Add the cottage cheese, herb quark, chives and cream. Season with salt and pepper.
In the meantime, cook the croissant noodles al dente. Then fold into the vegetables together with the grated Emmentaler and pour everything into a buttered, ovenproof casserole dish.
Bake in a preheated oven at 170 ° C for about 15-20 minutes. Serve hot.