This salad is bursting with fresh flavors: radishes, pea shoots, and cucumber. The secret to the dressing is lemon AND lime juices paired classically with Dijon and shallots. This is everything a springtime side should be.
To make the dressing, add the oil, lime juice, lemon juice, Dijon, shallots and 1/4 teaspoon each salt and pepper to a mason jar. Cover and shake the jar to emulsify. Set aside.
Add the sliced radishes and cucumbers to a large bowl. Spoon on about half of the dressing. Toss to combine. Add in the watercress and pea shoots and lightly toss. Transfer the salad to a serving platter. Garnish with flake salt and pepper. Serve with extra dressing on the side.