Start by slicing the radishes into thin rounds and placing them in a bowl of ice water. Let them soak for about 10 minutes to enhance their crunch and flavor.

In a large mixing bowl, combine the drained radishes with chopped fresh herbs, crumbled feta cheese, and chopped walnuts.

In a separate bowl, whisk together olive oil, vinegar, and honey or maple syrup. Add Dijon mustard if desired and whisk until smooth.

Drizzle the vinaigrette over the salad mixture and gently toss to combine.

Serve immediately for the freshest taste or store dressing separately until ready to serve.