Grill pineapple slices on an outdoor grill or on a grill pan in the kitchen. The simplest way to prepare the dish is to brush both sides of each slice with oil or butter. Oil the grill grates as well to prevent sticking. Cook the slices over medium heat for three to four minutes per side, until grill marks appear. The simplest option is to use canned pineapple rings, but fresh pineapple slices can be grilled, too.
Grilling brings out pineapple's natural sugars and gives the fruit a sweet caramelized crust, but if extra sweetness is desired, brush buttered slices with honey before cooking them. Alternatively, drizzle honey over the cooked slices, or sprinkle them with brown sugar and cinnamon.
Another option is to dunk pineapple slices in coconut milk before grilling instead of brushing them with butter or oil.
Marinate the pineapple slices first to get deeper, brighter flavor in the finished dish. Soak them in a tangy mixture of 2 tablespoons each of lime juice, honey and oil, as well as a pinch each of chili powder and cinnamon. Refrigerate the marinated pineapple slices for 30 minutes before grilling them.
Serve grilled pineapple over vanilla ice cream or eat them plain.