3/4 cup plain low-fat yogurt
2 teaspoons lemon juice
3 egg yolks
1/2 teaspoon prepared Dijon-style mustard
1/4 teaspoon salt
1/4 teaspoon white sugar
1 pinch ground black pepper
1 dash hot pepper sauce

8 eggs
8 slices rye bread
8 ounces smoked salmon, cut into thin slices
1 tablespoon chopped fresh parsley, for garnish
1 teaspoon capers, for garnish