In a large skillet over medium-high heat, add 1 tablespoon olive oil and red onions to the pan with a pinch of salt, and stir occasionally.

Meanwhile, add the pasta to a pot of boiling salted water and cook according to the package directions.

After the onions have cooked for 6 minutes, push them to the side of the pan. Slice the chicken sausages diagonally into 1/4 inch slices and add them to the pan with a tablespoon of olive oil and the cherry tomatoes. Cook for 4-5 minutes or until the sausage is heated through.

Drain the pasta, reserving 1/2 cup of the pasta water. Add the fettuccine, reserved pasta water, Alfredo sauce and Parmesan to the skillet with the sausage and veggies. Toss everything until it is well combined and the Alfredo sauce is heated through.

Serve immediately.