Whisk the vinegar, oil, mustard, salt, and
pepper together in a large bowl. Add the
cabbage, carrots, and jalapeño and toss well to
Cover and refrigerate for at least 30 minutes
or overnight to allow the flavors to meld.
Taste and season with more salt and pepper as
needed before serving.
Storage- Leftovers can be stored in an airtight
container in the refrigerator for up to 3 days.