makes about 1/2 cup

3 Tbsp. extra-virgin olive oil
2 Tbsp. red wine vinegar
1 Tbsp. Dijon mustard
1 Tbsp. cool water

In a medium bowl, whisk together the olive oil, red wine vinegar, mustard, and water.

This is an easy recipe to carry in your head or teach to kids. I’ve cheated on Alex and substituted a wide variety of oils, vinegars, and even Local Food Folks’ Dill Pickle mustard.