Preheat oven to 425° and place cast iron in to heat up.
Trip the ends from the Bussels and cut them in half.
In a bow,l toss the Brussels with 1 tbsp avocado oil, fresh ground pepper, and about 2 good pinches of kosher salt.
Remove the cast iron from the oven and add 1 tbsp avocado oil or clarified butter and the Brussels in a single layer, I like to place mine cut side down.
Roast 15 minutes
While Brussels are roasting in a small skillet over medium-low heat add one chopped date, balsamic, and water, and simmer while Brussels roast
Chop the remaining 4 dates, and roughly chop the 1/2 cup cashews.
When the 15 minutes are up, add the Brussels back to the bowl and add the glaze, dates, and cashews.
Toss and place back into the cast iron pan and roast for an additional 15 minutes.