A quick, rich sauce perfect for serving over ice cream, pie or any other dessert.
Put the brown sugar, half-and-half, butter, vanilla seeds and salt in a medium saucepan over medium-low to medium heat. Cook, whisking gently, until the mixture thickens, 5 to 7 minutes.
Serve warm or refrigerate until cold. If the sauce is too thin, just continue cooking for a few more minutes.