4 cups (loosely packed) watercress, trimmed 2 cups baby arugula 1 medium fennel bulb, very thinly sliced (reserve fronds for garnish) 1 large ruby red grapefruit, segmented (reserve 2 tbsp / 30 ml juice) 4 radishes, thinly sliced 1 Persian cucumber, thinly sliced or ribboned 1 / 4 cup fresh mint leaves, torn 1 / 3 cup pistachios, toasted and roughly chopped Flaky sea salt and freshly ground black pepper, to taste 1 / 3 cup extra-virgin olive oil 2 tbsp fresh lemon juice 1 tbsp champagne vinegar 1 tsp Dijon mustard 1 tsp honey 2 tbsp shallot, very finely minced 1 tsp lemon zest Pinch crushed red pepper flakes Optional: 1 oz shaved Parmesan
Toast pistachios in a dry skillet over medium heat until fragrant, 3–4 minutes; cool and roughly chop. Supreme the grapefruit over a bowl to catch juices; reserve 2 tbsp juice and set segments aside. Make the vinaigrette: In a bowl, whisk reserved grapefruit juice, lemon juice, champagne vinegar, Dijon, honey, shallot, lemon zest, red pepper flakes, 1/2 tsp salt, and a few grinds of black pepper. Slowly whisk in olive oil until emulsified. Prepare the vegetables: thinly slice fennel (a mandoline helps), radishes, and cucumber. Pick and tear mint leaves. Rinse and dry watercress and arugula well. In a large bowl, toss watercress, arugula, fennel, cucumber, radishes, and mint with about half the vinaigrette; season to taste with salt and pepper. Plate the salad, tuck in grapefruit segments, and scatter toasted pistachios. Drizzle with more vinaigrette as desired. Garnish with fennel fronds, a final pinch of flaky salt and black pepper, and shaved Parmesan if using. Serve immediately.
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