Cook the pasta according to package instructions in a large pot of salted boiling water until al dente. Drain and set aside.
In a large skillet over medium heat, add the olive oil and sauté the sliced sausage until browned, about 5 minutes.
Add the diced onion and bell pepper to the skillet, cooking until softened, about 3-4 minutes. Stir in the minced garlic and sauté for an additional minute until fragrant.
Pour in the chicken broth and heavy cream, then stir in the Cajun seasoning. Bring to a simmer and let it cook for about 5 minutes, allowing the sauce to thicken slightly.
Add the halved cherry tomatoes and cooked pasta to the skillet, tossing everything together to combine. Season with salt and pepper to taste.
Mix in the grated Parmesan cheese, stirring until melted and creamy. If the sauce is too thick, add a splash more broth or cream until you reach your desired consistency.
Remove from heat and let it sit for a few minutes. Garnish with freshly chopped parsley before serving.
Notes
Add more broth or cream if the sauce is too thick.