Roast Sprouts: Preheat oven to 400°F (200°C). Toss halved sprouts with olive oil, salt, and pepper. Spread in a single layer, cut-side down, on a parchment-lined baking sheet.

Bake: Roast for 20-30 minutes, tossing halfway, until golden brown, tender, and the edges are crispy/charred. Do not overcrowd the pan.

Make Glaze: While sprouts roast, combine balsamic vinegar, honey, brown sugar (if using), and soy sauce (if using) in a small saucepan. Bring to a simmer over medium heat.

Reduce: Reduce heat to low and simmer for 8-12 minutes, stirring occasionally, until the mixture reduces by half and thickens to a heavy, gooey consistency that coats the back of a spoon.

Glaze and Serve: Immediately transfer the hot, crispy sprouts to a large bowl. Pour the thick, glossy honey balsamic glaze over them and toss quickly until evenly coated. Serve immediately.