Prep: In a small bowl, season the shrimp with half of the Italian seasoning (1 tsp) and half of the Cajun seasoning (1 tsp). Season with a little salt and fresh black pepper. Drizzle with a tablespoon of olive oil and mix well.
Cook Shrimp: In a large skillet, pot or dutch oven (make sure it has a lid) over medium high heat, add the shrimp. Cook for just a couple of minutes until no longer pink. This will happen very fast! Remove shrimp and set aside.
Add Veggies: In the same pan, add onion and bell peppers until they start to soften (about 2-3 minutes). Add in garlic and cook for 30 seconds more. Season with remaining Italian and Cajun seasoning.
Cook Sausage: To the onions and peppers, add sausage. Cook about 3-5 minutes, breaking the meat up with a wooden spoon. Pro tip: In the last minute of cooking, use a potato masher to break up the meat--it gets it broken up nice and fine!
Add Pasta: Add the dry pasta, crushed tomatoes, chicken broth, and thyme springs. Give everything a big stir to get all the yummy browned bits from the bottom of the pan. Cover and simmer on medium heat for 13-15 minutes, until pasta is cooked al dente. Stir every so often to ensure the pasta doesn't stick to the bottom. Remove and discard thyme sprigs.Note: 13-15 minutes cooks fusilli pasta to al dente. If you use another pasta shape you may have to adjust the cooking time a bit. Make it Creamy: Stir the softened cream cheese into the pasta and mix well. Gently fold in cooked shrimp (plus all the juices from the plate)!
Taste & Season: Taste, and season with salt and pepper or more Cajun seasoning ONLY if needed. The sausage, chicken broth, and Cajun seasoning will contain a good amount of salt so no need to add additional salt unless needed.
Serve: Garnish with green onion and lots of fresh Parmesan cheese! Add some red pepper flakes or a sprinkle of cayenne pepper if you want a little kick! A squeeze of lemon juice is also delicious!