Heat oven to 400°F. In 2-quart saucepan, melt butter over medium heat. Stir in flour with whisk; cook and stir 2 minutes. Slowly beat in broth, whipping cream, 3/4 teaspoon of the salt and the nutmeg with whisk. Increase heat to medium-high; heat to boiling, stirring constantly. Reduce heat; simmer 3 to 5 minutes, stirring occasionally, until thickened. Remove from heat.