Directions

1. Heat olive oil in a large stockpot or Dutch oven over medium heat. Add Italian sausage and onion, and cook until sausage has browned, about 3-5 minutes, making sure to crumble the sausage as it cooks; drain excess fat.
2. Stir in marinara sauce, chicken stock, pasta, bell pepper, kale, garlic, Italian seasoning and crushed red pepper flakes; season with salt and pepper, to taste.
3. Bring to a boil; reduce heat and simmer, covered and stirring once, until pasta is cooked through, about 10-12 minutes. Stir in Parmesan.
4. Serve immediately, garnished with basil, if desired.