Wild salmon, green beans, new potatoes and herbs: simple seasonal ingredients for an epic summer dining experience. The most important thing here is not to overcook the salmon. Whether baked or grilled, it is ready as soon as you see white juices rising to the surface, which means the fish will be succulent, not dry. It is better to err on the rare side.
02Scrub potatoes and simmer in well-salted water until tender, about 15 minutes. Drain and keep warm.
03Top and tail the haricots verts and simmer in well-salted water until tender, 3 to 5 minutes. Spread out on a platter to cool (or rinse briefly in cool water) and leave at room temperature.
04Make the sauce verte: Put shallot in a small bowl with 1/2 teaspoon salt and cover with the red wine vinegar. Macerate 5 minutes, then stir in lemon zest and juice, mustard and capers. Whisk in 1/2 cup olive oil. Just before serving, add parsley, chervil and black pepper to taste.
05Bake salmon, uncovered, until just done, 10 to 12 minutes. Remove and let cool slightly. Put beans in a medium bowl, season with salt and pepper, and dress with 2 tablespoons sauce verte. Line a platter with lettuce leaves, if using, then make a pile of beans. With a spatula, lift salmon from skin, then place on top of beans. Dab salmon with 2 more tablespoons sauce verte, garnish with chopped egg and serve. Pass potatoes and remaining sauce separately.