Begin by cooking all the spaghetti noodles according to package directions for al dente. Drain and set aside.

Make meatballs using the italian sausage, egg and bread crumbs. Mix all together in a bowl. Form meatballs and cook in a large skillet until browned on all sides.

Preheat the oven to 350 degrees F. In a medium bowl, mix the cottage cheese, cream cheese and sour cream.

In a 9x13 inch pan, place 1/4 cup of butter sliced, in the bottom of the pan. Add half of the cooked spaghetti noodles. Add all the cooked meatballs. Top with half the cream cheese mixture. Add the remaining spaghetti noodles. Top with the remaining butter slices. Pour the entire bottle of marinara sauce on the noodles. Top with shredded cheese and bake 30-45 minutes or until cheese is bubbly.