SALMON WRAPPED POACHED EGGS

Steps:

• Preheat oven to 350°F.
• Make sauce:
• Whisk together sour cream and lemon juice. Add oil in a slow stream, whisking until emulsified. (If necessary, add water, 1/2 tablespoon at a time, for a thick yet spoonable consistency.) Stir in chives, tarragon, salt, and pepper to taste.
• Prepare brioches for serving:
• Soak onion in cold water to cover 10 minutes, then drain and pat dry.
• Halve and peel avocados and cut crosswise into 1/4-inch-thick slices, then sprinkle slices with lemon juice. Put 2 brioche toasts on each of 8 plates and season with salt and pepper. Arrange a few sorrel leaves on each toast, then top with avocado and onion.
• Poach eggs:
• Fill a well-buttered 17- by 11- by 2-inch flameproof baking pan with 1 1/4 inches water and stir in vinegar (to help whites coagulate faster). Set pan to straddle 2 burners and bring water to a simmer.
• Break 1 egg into a cup and slide into water. Repeat with remaining eggs, adding them in rows so you can easily take them out in same order. Poach eggs at a bare simmer 3 to 4 minutes, or until whites are firm but yolks are still runny. Transfer eggs as cooked with a slotted spoon to kitchen towels to drain and season with salt and pepper.
• Wrap each egg in a slice of salmon. Put a wrapped egg on top of each toast and drizzle sauce over salmon.