In a bowl, combine the cottage cheese, spinach, cream cheese, sour cream, garlic powder, salt and pepper.
Spread 1/2 cup of cottage cheese mixture over each noodle, roll up jelly-roll style. Place seam side down in an 11 X 7 X 2 inch baking dish coated with nonstick cooking spray. Sprinkle with mozzarella cheese.
Cover and bake at 350 degrees for 35 minutes.
Uncover, drizzle with spaghetti sauce if desired. Bake 10 minutes longer or until heated through.