Preheat the oven to 350 degrees. In a medium bowl, combine the mustard, wine, teriyaki sauce, soy sauce, honey, lemon juice, garlic powder, and white pepper. Place the salmon in the bowl and coat thoroughly.
Place the salmon in a baking dish, pour the remaining liquid over the salmon, and place the dish in the oven. Bake for 10 to 12 minutes.
Arrange 1 cup of greens on each plate and place a salmon fillet on top. Sprinkle the red onion over the plate.