Gather all ingredients. Freshness is key, so use the best quality Dijon mustard and honey.
In a medium mixing bowl, combine 3 tablespoons + 1 teaspoon of Dijon mustard and 2 tablespoons of honey. Use a whisk to blend until smooth.
Add 2 teaspoons of unseasoned rice vinegar for a tangy flavor.
Fold in 2 tablespoons of minced red onion and 2 teaspoons of finely chopped fresh dill.
Add ground black pepper to taste.
Slowly whisk in 3 tablespoons of mild olive oil until emulsified.
Taste and adjust sweetness or tanginess as desired.
Let the sauce sit for at least 30 minutes in the refrigerator before serving.