Step 1

Preheat the oven to 425 degrees F.

Step 2

Wash and half the Brussels Sprouts. Thinly slice the onions and mince the garlic. Toss them all together along with oil, rosemary, salt, and pepper. Spread onto a baking sheet in a single layer and bake for about 30 minutes, stirring occasionally, until browned on the outside and tender on the inside.

Step 3

Stir together balsamic vinegar and maple syrup and set aside.

Step 4

When the Brussels sprouts are charred along the edges, pull them from the oven and transfer them to a serving platter. Toss with hazelnuts and maple balsamic glaze. Serve immediately.