Sliced Oranges with Orange-Flower Syrup and Candied Hazelnuts

Preheat oven to 350 degrees. Make orange-flower syrup: Stir together orange juice, rosemary, honey, and orange-flower water in a small saucepan. Bring to a boil over medium-high heat. Cook, skimming foam from surface with a slotted spoon, until mixture has reduced to 1/3 cup, 7 to 9 minutes. Let syrup cool completely.

Make candied hazelnuts: Place nutsin a small bowl. Whisk egg white in anothersmall bowl until foamy. Stir 2 to 3tablespoons whipped egg white into thenuts (enough to coat nuts). Add brownsugar and cinnamon; stir to coat nuts.Transfer hazelnuts to a rimmed bakingsheet. Bake until nuts are dry, 5 to 7 minutes. Let cool completely.

Cut oranges into 1/4-inch-thick rounds. Divide among serving dishes. Drizzle orange-flower syrup on top; sprinkle with candied hazelnuts, dividing evenly. Garnish with rosemary sprigs, if desired.