How to Make It
Preheat the oven to 350°. Spread the pine nuts in a pie plate and bake for about 3 minutes, until golden brown. Let cool completely. In a food processor, combine the 2 cups of watercress with the toasted pine nuts, garlic and 1 teaspoon of the lemon juice and process to a coarse puree. With the machine on, gradually stream in 1/4 cup of the olive oil and process until smooth. Season the pesto with kosher salt.
Spread 1 tablespoon of the watercress pesto in the center of each plate. Arrange the red snapper slices over the pesto, overlapping them slightly. In a small bowl, toss the small watercress sprigs with the remaining 1 teaspoon each of lemon juice and olive oil and season with kosher salt. Mound the watercress salad on the plates next to the snapper. Lightly drizzle the snapper with olive oil and sprinkle with Maldon salt. Serve right away.