01 -
Boil pasta in salted water according to package instructions. Reserve 1 cup of pasta water before draining.
02 -
Brown the ground Italian sausage in a skillet over medium-high heat for about 6 minutes. Drain any excess fat.
03 -
Add diced onions to the skillet and cook for 2-3 minutes. Stir in the bell peppers, diced tomatoes, and Italian seasoning. Cook for 8-10 minutes until the peppers soften.
04 -
Mix the cooked pasta with the sausage and vegetable mixture in a large pot.
05 -
Add the reserved pasta water gradually to reach the desired consistency. Top with Parmesan cheese and serve immediately.