Season chicken breast to taste with salt, pepper, and blackened seasoning. Grill for about 3-4 on each side. If you don't have a grill, you can cook the chicken on a greased frying pan as well.
After the chicken is fully cooked, and cool down, chop it into 1 inch cubes and set aside.
Thinly slice the green onion and chop the sun dried tomatoes into small pieces.
In a large skillet, heat butter over medium high heat and add in the green onion, sun dried tomatoes, dried basil, garlic powder, salt, and pepper.
Once the green onion and sun dried tomatoes have been cooking for about 2 minutes, add in the whipping cream. Bring the heat down to low and add the Parmesan cheese once the sauce comes to a simmer.
Mix in the cubed chicken and stir every few minutes.
Make the pasta according to the package. Then drain out the water and mix the pasta into the sauce.
Notes
FAQs answered in the post above:
How to make homemade blackened seasoning.
How to pan-fry the chicken instead of grilling it.
How to make it ahead of time, store, and freeze it.