Preheat the oven to 400 degrees F.
Cook pasta in boiling salted water for about 5 minutes
Drain pasta and set aside
Put olive oil in a sauté pan over medium heat.
Add chicken sausage and cook for 3 minutes
Add the onions and garlic then cook until soft and sausage is cooked through for another 5 minutes
Put the chicken sausage mixture into a bowl then add cooked pasta
Add the Bertolli sauce, mozzarella cheese, parsley, salt, and pepper. Mix well.
Place the whole mixture in a baking dish.
In a small bowl mix together the bread crumbs and the parmesan cheese. Sprinkle over the top of pasta mixture
Drop small bits of butter. Bake until the top is golden brown, about 30 minutes.
Inspired by Food Network