1 cup sour cream
3 tablespoons sliced green onion
1 egg yolk, beaten
2 tablespoons prepared mustard
1 teaspoon lemon juice
1/2 teaspoon sugar
1/4 teaspoon salt
1. Combine sour cream, green onion, egg yolk, prepared mustard, lemon juice, sugar, and salt.
2. Serve hot or cold.
ABOUT 1 1/2 CUPS