In a large pot or deep skillet, heat the olive oil over medium heat. Add the sliced Andouille sausage and cook until browned and slightly crispy, about 5-7 minutes. Once browned, remove the sausage from the pot and set aside on a plate.
Using the same pot, add the diced onion. Sauté for about 3 minutes, or until the onion becomes translucent and fragrant. Then, stir in the minced garlic along with both chopped bell peppers and continue to cook for an additional 2-3 minutes, stirring occasionally until the peppers soften.
Pour in the chicken broth and bring it to a gentle simmer. Once simmering, add the penne pasta and sprinkle in the Cajun seasoning. Stir well to ensure everything is evenly mixed.
Allow the pasta to cook in the broth for about 10-12 minutes, or until it reaches an al dente texture. Be sure to stir occasionally to prevent the pasta from sticking to the bottom of the pot.
After the pasta is cooked, reduce the heat to low. Stir in the heavy cream and halved cherry tomatoes, mixing everything until well combined and creamy in consistency.
Gently fold the cooked sausage back into the pot. Stir until it is evenly distributed and heated through. Lastly, season with salt and pepper according to your taste preference.
Remove the pot from heat and let it sit for a minute. This allows the flavors to meld before serving.
Notes
Serve hot, garnished with freshly chopped parsley and extra Cajun seasoning for added flavor.