From an article about maple syrup in the Washington Post.
Ingredients
3 tablespoons maple syrup
1/4 teaspoon salt
1/8 teaspoon ground cayenne pepper
1/8 teaspoon ground cinnamon
1 1/2 cups unsalted walnut or pecan halves
Instructions
1. Preheat the oven to 375 degrees. Line a rimmed baking sheet with parchment paper.
2. Stir together the maple syrup, salt, cayenne pepper and cinnamon in a medium bowl until well blended, then stir in the nuts so they are evenly coated. Spread the nuts on the baking sheet in a single layer, drizzling over them anything that's left in the bowl.
3. Roast (middle rack) for 8 to 10 minutes, stirring them every 2 to 3 minutes, until browned, shiny and fragrant. (If you don't stir them, they will burn.) Let cool completely; they will crisp up as they cool.