Purple grapes give it the richest color, but red grapes taste and look great too.
Add shallots and cook, stirring, until softened, about 2 minutes.
Add grapes, sherry, vinegar, mustard seeds and salt.

Tips
Make Ahead Tip: Cover and refrigerate for up to 1 week.
- Daily Values (DVs) are the recommended amounts of nutrients to consume each day.
(-) Information is not currently available for this nutrient.