Cook the penne pasta in salted boiling water until al dente. Drain and set aside.

In a large skillet, heat olive oil over medium heat. Add chicken seasoned with salt and pepper; cook until no longer pink (5-7 minutes) and remove from skillet.

In the same skillet, add sausage, breaking it up as it cooks until browned (about 5 minutes).

Sauté chopped onion and red bell pepper until softened (4-5 minutes), then add minced garlic for an additional 30 seconds.

Return chicken to the skillet; add diced tomatoes, chicken broth, and Italian seasoning. Simmer for about 5 minutes.

Toss in cooked penne until well-coated with sauce; garnish with fresh basil if desired.