Spiced Niçoise Salad

Name: Spiced Niçoise Salad
Ingredients: Kosher salt; 8 ounces green beans, trimmed; 3 large eggs; 1 to 2 tablespoons harissa, to taste; 1/2 teaspoon finely grated lemon zest plus 1 tablespoon lemon juice; Freshly ground pepper; 1/4 cup extra-virgin olive oil; 1 15-ounce can chickpeas, drained and rinsed; 1 cup cherry tomatoes, halved; 2 hearts romaine lettuce, chopped; 2 5-ounce cans oil-packed tuna, drained; 12 pitted kalamata olives, halved; 2 pieces flatbread, toasted and cut into wedges