It's simple but prep time is a bit harsh
I use canned pineapple chunks. But if you have fresh pineapple, that'll work too (even better taste)!
So; 1 scallop (small one or if you have big sea scallops, cut it in half); place two pineapple slices with the scallop, one on top and one on the bottom - about 1 cm thick and as long as your scallop roughly. Wrap that all with a piece of bacon* - smallish scallop will require a 1/2 slice of bacon (regular sliced bacon - not peameal or Canadian bacon). Secure the wrapped scallop & pineapple using a toothpick (or 2?). I just sprinkle with a little pepper and salt before cooking. If you wanna go full-metal Canadian, brush with real maple syrup once they're cooked and out from under the broiler. Not necessary IMO. Place your wrapped bits of heaven on a wire rack in a baking sheet lined with foil wrap for easy clean-up. Put in the over on Broil. 5 -6 mins. then pull it out and turn the pieces over and broil for another 5 mins. Serve immediately and try to get your share before others gobble them all up! Let the bacon fat rendered from the bacon coagulate in the foil lined pan for a few hours then remove the foil and toss it - very easy clean up.
* Some people will precook their bacon a bit before wrapping the scallops/pineapple combo. I don't because I prefer mine more under-cooked than really crispy. It's a personal choice which way you go on that. Mine end up with some blackened edges but the inner layers of bacon are more chewy than crispy. Personal preference which way to go with that.