Mine were the green ones. When you grill them (after cutting in half length wise) it brings out their natural sugars. Sometimes I'll sprinkle alittle sugar on the grilled side and pull out my Chef blowtorch, and use it to caramelize the Sugar (similar to a brulee)
For the Brussel Sprout Glaze, take equal parts of Maple Syrup & Brown Sugar....wisk well with a fork, and half way through the baking brush that on them. Also, make sure to use Applewood Smoked bacon.
I do that for the GF all the time. When I lived in Orlando I had a Fig Tree, and I'd grill the Figs, then layer them with Goat cheese, and drizzle some balsamic vinegar on them. That and the Brussel Sprouts were her favorites