Pre-heat the oven to 350 degrees. Lightly grease a 9×13” casserole dish. Bring a large pot of lightly salted water to a boil. Add the pasta to the pot and boil for 8 to 10 minutes or until al dente. Drain and set aside.
Meanwhile, in a medium skillet over medium-high heat, cook the Italian sausage until evenly brown. Drain off any excess liquid.
In the prepared casserole dish mix the cook rotini pasta, Italian sausage, and pasta sauce.
In a medium bowl mix the cottage cheese, sliced black olives, and mozzarella cheese. Spoon the cheese mixture over the pasta mixture.
Top with pepperoni slices.
Place into the oven and bake for 25 minutes at 350 degrees until bubbly and lightly browned.
(Makes 8 Servings)