Preheat your oven to 400°F and line a baking sheet with parchment paper.
Trim the ends off the Brussels sprouts and cut them in half lengthwise.
Place the sprouts on the baking sheet, drizzle with olive oil, and sprinkle with half of the sea salt and black pepper.
Roast the Brussels sprouts for 20 minutes until they are tender and the edges are golden brown.
Season the chicken breast with garlic powder and the remaining salt and pepper.
Heat a non-stick skillet over medium-high heat and cook the chicken for 6 minutes per side until cooked through.
Remove the chicken from the pan, let it rest for five minutes, then slice it into thin strips.
In the same skillet, sear the prosciutto for 1 minute until it becomes crispy, then tear it into bite-sized pieces.
Combine the roasted sprouts, sliced chicken, and crispy prosciutto in a large bowl.
Drizzle the balsamic glaze over the mixture and toss gently to coat everything evenly before serving.