Step 1In a small bowl, combine the shallots and the vinegar and set aside for 1 hour.
Step 2Toss the green beans with 2 tablespoons of the olive oil and sprinkle with salt. Grill over high heat until browned on both sides, about 8 to 10 minutes on an outdoor grill on the grill surface or in a grill basket.
Step 3Toss the grilled green beans with the lemon zest and arrange on a platter. Season with additional salt and pepper to taste.
Step 4Spoon the pickled shallots over the the beans. Drizzle with 2 tablespoons remaining olive oil.