Cook the pasta in a large pot of boiling salted water according to package directions.
Heat the olive oil in a large skillet over medium-high heat. Add the chicken breasts and season with salt and pepper. Cook for 4-5 minutes or until golden brown on both sides, stirring occasionally.
Add the garlic and chili flakes and cook for 1 minute. Add the broccoli and cook for an additional 2 minutes or until tender.
Add the cooked pasta, parmesan cheese, cream cheese, and alfredo sauce to the skillet and stir to combine. Cook for 3-4 minutes or until the sauce is heated through.
Remove from heat and add in the sundried tomatoes and chopped croutons.
Garnish with a wedge of lemon and minced parsley, if desired. Serve immediately.