Press the garlic and mix with the tomatoes. Season to taste with salt, pepper and sugar. Mix the quark with the parsley and 300 g Gouda cheese, season with salt and pepper.
Fill the cannelloni with the quark mixture and place in a baking dish. Pour the tomato sauce over the top and sprinkle with the remaining Gouda cheese. Bake at 200 ° C for about 40 minutes.