Preheat your oven to 400°F (200°C).
Trim the ends off the Brussels sprouts and cut them in half.
Place the sprouts on a large baking sheet and toss with olive oil, sea salt, black pepper, and garlic powder.
Roast the Brussels sprouts for 20 to 25 minutes, flipping halfway through, until they are tender and the outer leaves are charred.
While the sprouts roast, heat a large skillet over medium heat and add the diced pancetta.
Cook the pancetta until it becomes crispy and has rendered its fat, then remove the pancetta with a slotted spoon and set aside.
Increase the skillet heat to medium-high and add the diced chicken breast to the remaining fat, searing until golden brown and cooked through.
Add the roasted Brussels sprouts and crispy pancetta back into the skillet with the chicken.
Drizzle the balsamic glaze over the mixture and toss for 1 minute until everything is coated and heated through.