Preheat the oven to 375 degrees F. Spread the hazelnuts on a baking sheet and bake until golden, 6 to 8 minutes. Let cool, then chop.
Halve the Brussels sprouts lengthwise and thinly slice them crosswise into fine ribbons. You should have about 6 cups.
In a large skillet set over medium-high heat, heat the olive oil. Add the shallot and cook 1 minute. Add the garlic and cook 30 seconds. Add the Brussels sprouts and cook, stirring, until tender, about 5 minutes. Add the maple syrup and hazelnuts and cook 1 minute. Season with salt and pepper to taste and serve hot.
Photograph by Ryan Liebe
Courtesy of Food Network Magazine