Grill pineapple over direct heat - not too hot - for about 5 minutes per side. You just want it lightly browned with grill marks. Use a spatula to remove from grill to keep them whole.

Mix everything but the pineapple rings together. You could blend it, stir it, or use a fancy mixer.

Add the grilled pineapple ring to your drink and enjoy. Don't forget to eat the pineapple when your drink is gone! :)