Stripling's Fajita Seasoning is the deciding factor between average fajitas and the ones which make friends RSVP sooner. And though they can be served year round, we recommend fajitas in the fall (or when the weather turns cool) and you've planned a long day of watching all the football games. Marinate the meat the night before if you don't want to waste game-day time, and then throw the meat on the grill during half-time.