Combine the boiled cider, olive oil, and sea salt.
Next, toss with the prepared Brussel sprouts until coated.
Place in a single layer on a baking sheet and roast at 400°F for 45 minutes, stirring occasionally until the Brussels are nicely browned and well-roasted.
Remove from the oven and set aside.
Next, fry the chopped pancetta in a sauté pan until crisp like bacon.
Sprinkle pancetta on top of the roasted Brussel sprouts.
The Cider-Roasted Brussel Sprouts with Pancetta are ready to serve!