1Cook pasta shells according to package directions.
2Meanwhile, in a large saucepan, cook sausage over medium heat until no longer pink; drain. Set half of the sausage aside for filling.
3Add the tomato paste, water, brown sugar, and Italian seasoning to remaining sausage. Bring to a boil. Reduce heat; simmer, uncovered, for 15 minutes, stirring occasionally. Drain pasta.
4In a large bowl, combine the cottage cheese, 1 c. mozzarella, egg, parsley, and reserved sausage. Stuff into shells.
5Spread 1/2 c. meat sauce into an ungreased shallow 2 quart baking dish. Arrange stuffed shells in dish; drizzle with remaining mozzarella and parmesan. Bake uncovered at 350* for 25-30 minutes or until heated through.