Place a rimmed baking sheet on middle rack in oven; preheat oven to 425°. Stir together ¼ cup extra-virgin olive oil, 3 Tbsp. balsamic vinegar, 1 Tbsp. honey, 2 tsp. Diamond Crystal or 1¼ tsp. Morton kosher salt, and 3 large garlic cloves, finely grated, in a medium bowl; season with freshly cracked black pepper. Taste mixture and add more honey if needed. Add 2 lb. brussels sprouts, trimmed, halved, quartered if large, along with any loose leaves; toss to coat.