Preheat grill. In a resealable plastic bag place the chicken, oil, and the 2 teaspoons blackened seasoning. Turn bag to coat chicken.
Place chicken on the rack of an uncovered grill directly over medium heat. Grill for 12 to 15 minutes or until no longer pink (170 degree F), turning once halfway through grilling. (Or in a large skillet cook chicken in 1 tablespoon hot olive oil or cooking oil for 8 to 10 minutes or until no longer pink [170 degree F], turning once.) Cut chicken into 1/2-inch cubes; set aside.
Meanwhile, cook pasta according to the package directions, except add the broccoli and carrots for the last 8 minutes of cooking. Drain; return to pan. Stir in grilled chicken, Alfredo sauce, and the 1/2 teaspoon blackened seasoning. Heat through. Makes 4 servings.