Fill a large pot with lightly salted water and bring to a rolling boil. Cook fettuccine at a boil until tender yet firm to the bite, about 8 minutes.
Meanwhile, toss chicken tenders and Cajun seasoning in a bowl until well seasoned.
Melt butter in a skillet over medium-high heat and saute chicken until browned, 7 to 8 minutes. Add cream, sun- dried tomatoes, green onions, Parmesan cheese, salt, basil, black pepper, and garlic powder. Cook and stir until completely heated, 2 to 3 minutes.
Drain fettuccine. Serve chicken and sauce over the cooked fettuccine.