Cook fettuccine and drain. Meanwhile, combine cottage cheese, skim milk, arrowroot, salt and pepper, and garlic and onion powders if desired, in a blender. Puree until smooth. Transfer mixture to a heavy skillet or saucepan, add parsley and warm over medium-low heat for 10 minutes. Do not let sauce boil. Remove from heat and pour over hot, drained noodles. Sprinkle with parmesan.
Variations: use tomato or spinach fettuccine, and garnish with sun-dried tomatoes and chopped fresh basil.
Or lightly steam 1 cup broccoli florets for 3 to 4 min, until tender-crisp. Toss with sauce and hot pasta.
Or saute 0.75 cup sliced mushrooms in 2 tb red wine. Toss with sauce and hot pasta.
Per serving: 452 cal; 19g prot; 5g fat; 80g carb; 104mg chol; 424mg sod; 0.4g fiber.