In a medium bowl, combine the orange juice, olive oil, lemon juice and orange zest and season with salt and pepper. Add the salmon and red onion and toss to coat with the dressing. Arrange the salad on a plate and serve.
Wine Recommendation: The oily richness of smoked salmon is a classic match with the lemony-dry tartness of Champagne. Look for nonvintage bruts from Taittinger or Perrier-Jouët.
Notes: Use water-packed salmon or tuna, or try the delicious and delicate smoked whitefish that's available by mail from Minnesota's Ojibwe Foods, 218-335-8312.