Whole Foods Market's recipe for poached salmon with fresh horseradish sauce calls for salmon fillet, white wine, onion, dill, horseradish root and lemon juice. Whole Foods Market publishes the recipe on WholeFoodsMarket.com.
Season a 3-pound skin-on salmon fillet with salt and pepper to taste. Add 1 cup of water to a roasting pan with 1 cup of white wine, a sliced yellow onion, 1/2 teaspoon of peppercorns and four whole sprigs of fresh dill. Place the salmon fillet to the roasting pan. If necessary, add additional water so the fillet is just barely covered by liquid. Gently bring the pan to a simmer, then cover and simmer for about 10 minutes until the salmon is just opaque in the middle.
Remove the pan from the heat and allow the fillet to cool slightly. Remove the fillet to a large platter to allow to continue cooling. Cover the salmon and refrigerate it for several hours.
For the sauce, peel and grate a 1-inch piece of horseradish root and add it to a bowl with 1 teaspoon of lemon juice and salt. Add 1 cup of crème fraîche, half of a peeled, seeded and chopped cucumber and 1/4 cup of chopped fresh dill to the horseradish and lemon juice. Mix well. Taste and adjust the seasoning with salt, pepper and lemon juice as desired.
To serve, peel the skin off the salmon, and garnish the platter with four dill sprigs and a half of a sliced cucumber. Include the sauce on the side.