Peel and trim pineapple, season with salt and pepper and brush with oil.
Place pineapple, peppers and onions on the grill and cook until you have nice grill marks on the pineapple, the onion is getting soft and the peppers are blistered (about 10 minutes)
Remove everything from the grill and immediately place peppers in a zipped baggie to steam them and help remove skins.
Take half of the pineapple and run it through the blender or food processor. Cut the other half into small pieces.
Skin pepper, clean out seeds and chop.
Peel onion and chop
Toss everything into a bowl (don't forget the cilantro and garlic!) and mix well. Chill for 20 minutes and serve with tortilla chips, meat, chicken or fish!