To prepare the onion, skin them, but don't cut off the ends.
Then quarter the onion. Each quarter will give you 3 perfect size wedges.
Wrap the wedges in bacon and secure with a toothpick.
Then cut the end of the onion wedge off.
Place on a baking sheet, lined with tin foil.
Drizzle with a generous amount of balsamic glaze. If your local grocer doesn't carry a balsamic glaze, buy a cheap balsamic vinegar, put it over medium/low to reduce by 1/2. It will become the consistency of syrup, and the flavor is very concentrated.
As a side three per person works out well, although I always want more than we make.
A great side item, tonight we served them with a NY strip and a spinach salad.