In a large pot of boiling salted water, cook pasta according to package instructions; drain well.
Heat olive oil in a large skillet over medium high heat. Add sausage, and cook, stirring frequently, until sausage is lightly browned, about 3-4 minutes; set aside.
To make the cream sauce, melt butter in a large skillet over medium heat. Add garlic and cook, stirring frequently, until fragrant, about 1-2 minutes. Whisk in flour until lightly browned, about 1 minute. Gradually whisk in chicken broth and cook, whisking constantly, until incorporated, about 1-2 minutes.
Stir in heavy cream, sun dried tomatoes, Parmesan, oregano, basil and red pepper flakes until slightly thickened, about 1 minute. Season with salt and pepper, to taste.
Stir in pasta and sausage until well combined, about 1-2 minutes.
Serve immediately, garnished with parsley, if desired.
