Step 1

Dressing: Add the vinegar, oil, mustard, and salt to the base of a medium bowl and whisk until emulsified

Step 2

Combine: Toss in the cucumber, onion, and dill and fold into the dressing until everything is well incorporated. Allow to sit and marinate at room temperature for 5-10 minutes before serving, to allow the flavors to combine. You can also let this marinate in the fridge for up to 1 hour before serving.

Step 3

Serve: Serve as desired; this salad is best served fresh, as leftovers will become soggy over time.