Eggs Benedict with Salmon

To make the sauce: In the top of a double boiler, whisk together yogurt, lemon juice, egg yolks, mustard, salt, sugar, pepper and hot sauce. Cook over simmering water while stirring constantly, for 6 to 8 minutes, or until sauce is thick enough to coat the back of the spoon. In a large stock pot heat 2 quarts of salted water to a boil. Carefully break the eggs one at a time into the boiling water. When all the eggs have been added, reduce the heat to medium. When the eggs float to the top, remove them with a slotted spoon and let drain briefly. To assemble final dish: Toast bread slices and place on warm plates. Top each piece of toast with a slice of smoked salmon and a hot poached egg. Drizzle with yogurt sauce; garnish with parsley and capers.