Slice the Brussels sprouts in half and finely dice the pancetta.
Season the chicken breast evenly with garlic powder, sea salt, and black pepper.
In a large skillet over medium heat, cook the pancetta until the fat renders and it becomes crispy.
Remove the pancetta with a slotted spoon, leaving the rendered fat in the pan, and add the olive oil.
Place the chicken in the skillet and sear for 6-7 minutes per side until golden brown and cooked through, then remove and let rest.
Add the Brussels sprouts to the same skillet, cut-side down, and sear for 5-8 minutes until charred and tender.
Slice the rested chicken into strips and return it to the pan along with the crispy pancetta.
Drizzle the balsamic glaze over the mixture and toss everything together for 1 minute until well-coated and fragrant.