3 tablespoons unsalted butter
3 tablespoons all-purpose flour
1 1/2 cups beef broth
2 teaspoons dried {dill} or 1 1/2 tablespoons fresh dill, chopped
1/2 teaspoon salt
1/4 teaspoon ground {nutmeg}
3/4 cup dairy sour cream

Melt butter in a heavy saucepan over low heat. Gradually stir in flour, cooking and stirring until bubbly. Next add broth, dill, salt and nutmeg. Remove from heat and stir in sour cream.

Pour sauce over meatballs and serve.