1. Preheat oven to 400°.
2. Combine the first 6 ingredients in a small bowl.
3. Line a baking sheet with foil; coat foil with cooking spray. Arrange trout in a single layer on baking sheet. Sprinkle hazelnut mixture evenly over trout. Bake at 400° for 10 minutes or until fish flakes easily when tested with a fork or until desired degree of doneness. Serve with lemon wedges, if desired.
Wine note: Chardonnay tastes wonderful in the company of nuts (it's because both are rich). For this recipe, I recommend a chardonnay that's also fresh, clean, dry, and simple (not to mention a steal). The 2006 Fortant de France Chardonnay from the South of France is $12. —Karen MacNeil