Begin by cooking the fettuccine pasta according to package instructions. Drain and set aside.
In a large skillet, heat olive oil over medium heat. Add the sliced sausage and cook until browned, about 5 minutes.
Add the diced onion and bell pepper to the skillet. Sauté for another 3-4 minutes until the onion becomes translucent.
Stir in the minced garlic and cook for an additional minute, making sure not to burn the garlic.
Next, add the shrimp to the skillet, cooking until they turn pink (about 3-4 minutes).
Pour in the heavy cream and chicken broth, stirring to combine. Allow the mixture to simmer for about 5 minutes.
Stir in the Cajun seasoning and season with salt and pepper to taste.
Add the cooked fettuccine to the skillet, tossing everything together to evenly coat the pasta in the creamy sauce.
Allow everything to heat through for another 2-3 minutes, then remove from heat.
Serve hot, garnished with chopped parsley.