Grilled Salmon with Spinach and Yogurt Dill Sauce

Bahan-bahan (4 porsi)

• ½ cup nonfat yogurt
• 2 tablespoons prepared horseradish
• 1 teaspoon minced fresh dill ((save some extra sprigs for garnish))
• Four 6-ounce salmon filets
• ¼ cup white wine
• 2 teaspoons minced garlic
• 10 ounces fresh spinach leaves (trimmed)
• dash of freshly grated nutmeg
• dash of freshly ground black pepper
• lemon wedges for garnish