Salmon Salad Niçoise

Name: Salmon Salad Niçoise
Ingredients: 1 tablespoon sherry vinegar; 1 tablespoon freshly squeezed lemon juice; 0.5 teaspoon Dijon mustard; 0.5 clove garlic, minced; 3 tablespoons extra-virgin olive oil; salt and freshly ground black pepper to taste; 0.5 pound small red potatoes, cubed; 0.5 (10 ounce) bag haricot verts or tender young green beans; 0.5 medium green bell pepper, cut into thin strips; 7 leaves Bibb lettuce; 8 pitted Kalamata olives, halved lengthwise; 1 cup cherry tomatoes, halved lengthwise; 1 tablespoon extra-virgin olive oil; salt to taste; 5 ounces cooked salmon, flaked; 1 large hard-boiled egg