Preheat your oven to 425°F. Meanwhile, pat the chicken breast dry, and season both sides with salt, pepper, and a pinch of garlic powder.
In a bowl, toss the halved Brussels sprouts with olive oil, garlic powder, salt, pepper, and crushed red pepper flakes until evenly coated.
Place the Brussels sprouts on a baking sheet and roast in the oven for 20-25 minutes, tossing halfway through, until they are crispy on the edges and tender on the inside.
While the Brussels sprouts roast, grill the chicken breast on a preheated grill or skillet over medium-high heat for 5-7 minutes per side or until fully cooked.
In a small saucepan over medium heat, combine honey and balsamic vinegar. Allow the mixture to simmer for 2-3 minutes until slightly thickened to form the glaze.
Once the chicken is cooked, slice it into strips. Drizzle the honey-balsamic glaze over both the roasted Brussels sprouts and the grilled chicken.
Combine the glazed Brussels sprouts and chicken on a serving plate. Serve warm and enjoy the delightful blend of sweet, tangy, and savory flavors.