Preheat oven to 425 degrees.
Cut brussel sprouts in half. Reserve leaves that fall off if you'd like.
In a large bowl, toss brussel sprouts in olive oil, salt, and pepper. Add to a sheet pan. If using extra leaves, add to another pan or piece of foil.
After 15 minutes, remove the extra leaves. Flip the whole brussels and continue roasting 20 minutes or until brown.
While the brussel sprouts are roasting, add garlic and a splash of olive oil to a pan over medium heat. Saute for 3-4 minutes.
Add balsamic vinegar and honey, stirring frequently. Bring to a boil and quickly reduce to a simmer. Stir often. Simmer for 15-20 minutes or until the glaze reaches a thick consistency.
Pour balsamic glaze over brussel sprouts fresh from the oven and serve immediately.