Spread 1 cup sauce mixture over bottom of pan. Layer with 1/3 of the spätzle noodles, 1/3 of sauce mixture, 1/2 of the cottage cheese mixture, 1/2 of the sauerkraut & 3/4 cup grated cheese. Repeat layers (spätzle, sauce, cottage cheese, sauerkraut, spätzle, sauce). Save grated cheese for the last 5 minutes of baking.