Preheat oven to 400º F. Line baking sheet with parchment paper or silicone baking mat.
Cut washed brussel sprouts in half lengthwise. Spread evenly on baking sheet in one layer. Add whole grape tomatoes and disperse evenly.
Sprinkle the minced garlic over the brussel sprouts and tomatoes. Don't worry if it is in clumps right now. Bake for 10 minutes.
Remove from oven and toss to mix and then spread out evenly again. Bake for 10-12 more minutes or until the brussel sprouts are lightly browned and the tomatoes are breaking open.
Serve immediately with a drizzle of balsamic glaze and light sprinkle of salt to taste. Refrigerate leftovers in an airtight container for up to 1 week.