Begin by cooking the penne pasta according to package instructions in a large pot of salted boiling water. Once cooked, drain and set aside.
In a large skillet, heat the olive oil over medium heat. Add the sliced kielbasa and cook until browned and heated through, about 5-7 minutes.
Add the diced onion and minced garlic to the skillet with the kielbasa. Sauté for an additional 3-4 minutes, or until the onion is translucent and fragrant.
Pour in the chicken broth and bring the mixture to a simmer. Stir in the heavy cream, Dijon mustard, garlic powder, Italian seasoning, and season with salt and pepper. Allow the sauce to simmer for about 5 minutes, stirring occasionally.
Add the frozen peas to the sauce and stir until warmed through.
Toss the cooked penne pasta into the skillet, mixing well until the pasta is evenly coated with the creamy sauce.
Remove from heat and stir in the grated parmesan cheese until melted and creamy.
Serve immediately, garnished with chopped fresh parsley for an added burst of flavor and color.