Prepare the freekah, 3 parts water to every 1 part freekah, and a tbsp of salt, boil for 15-20 minutes, then close the lid and put it to the side.
Put the oven or broiler on. I used the broiler on low, but the oven on 400F works just fine. On an oiled sheet pan, spread the brussel sprout halves and sprinkle extra oil atop, some salt, pepper, and cayenne. Keep an eye on them and roast until they get browned, stirring and flipping them over halfway. They could take 15-20 minutes.
In a blender, mix all the sauce ingredients and blend until it's a thick cream.
Toss the freekah in a bowl with the brussel sprouts on top, and pour the cream over. Sprinkle the capers over this dish.