Cut pineapple into wedges and place in a large bowl. Add Fireball and refrigerate for 1 hour, stirring once after 30 minutes have passed.
Drain pineapple and reserve Fireball for future use. In a large bowl, combine pineapple, cinnamon sugar, and cayenne, if using. Toss until pineapple is fully coated.
Preheat grill or grill pan to medium-high. Place pineapple on grill and cook, turning occasionally, until you can easily insert a paring knife into the center of a wedge, 8 to 10 minutes.
Recipe by The Best Video Recipes for All at https://recipes-for-all.com/fireball-grilled-pineapple/