In a large pot, bring salted water to a rolling boil. Add the fettuccine and cook according to package instructions until al dente, approximately 8-10 minutes. Drain well and set aside.
In a large skillet, heat the olive oil over medium heat. Add the sliced turkey sausage and cook, stirring occasionally, until browned and heated through, about 5-7 minutes. Use a slotted spoon to remove the sausage from the skillet, placing it onto a plate to cool while you prepare the vegetables.
In the same skillet, add the diced onion and sauté for 3-4 minutes until soft and translucent. Incorporate the minced garlic, red bell pepper, and green bell pepper, cooking for an additional 5 minutes, or until the peppers are tender and vibrant.
Pour in the heavy cream and chicken broth, stirring to combine with the sautéed vegetables. Sprinkle in the Cajun seasoning and season with salt and freshly cracked pepper to taste. Bring the mixture to a gentle simmer and allow it to cook for about 5 minutes until it thickens slightly.
Return the browned turkey sausage to the skillet, followed by the halved cherry tomatoes. Stir gently and cook for an additional 2-3 minutes until the tomatoes are warmed through and starting to soften.
Add the drained fettuccine to the sauce mixture. Toss everything together until the pasta is evenly coated in the creamy sauce. Let it cook on low heat for an extra minute to allow all flavors to meld beautifully together.
Stir in the grated Parmesan cheese, mixing until it melts seamlessly into the sauce creating a creamy texture. Remove the skillet from the heat and garnish with freshly chopped parsley before serving.
Notes
Serve in shallow bowls with extra Parmesan and cherry tomatoes for garnish.