Preheat your oven to 400°F and line a baking sheet with parchment paper.
Trim and halve the Brussels sprouts, then toss them on the baking sheet with olive oil, sea salt, and black pepper.
Roast the sprouts for 20-25 minutes, flipping halfway through, until they are tender and the edges are beautifully charred.
While the sprouts roast, dice the pancetta and place it in a large skillet over medium heat, cooking until crispy and golden.
Remove the pancetta with a slotted spoon and set aside, then add the chicken breast to the same skillet, searing for 6-7 minutes per side until the internal temperature reaches 165°F.
Mince the garlic and add it to the skillet during the last minute of the chicken's cooking time to avoid burning.
Slice the chicken into strips and toss it into a large bowl with the roasted Brussels sprouts and crispy pancetta.
Drizzle the balsamic glaze over the mixture and toss well to ensure every bite is coated before serving.