Fry the diced onion in the butter until translucent. Add zucchini cubes and pepperoni cubes and fry with them. Remove from heat and stir in cottage cheese, herb quark, chives and cream, season with salt and pepper.
Cook the pasta until al dente, then drain. Pour into a buttered, fireproof form and mix with the cottage cheese mixture and the Emmentaler.
Bake in a preheated oven at 170 ° C for about 15-20 minutes.