Ingredient:

• 1 pound red potatoes (about 2 large), cubed
• 1/4 pound fresh green beans, trimmed
• 1/2 cup oil and vinegar salad dressing
• 1/2 teaspoon grated lemon zest
• 1/4 teaspoon freshly ground pepper
• 6 cups torn romaine
• 4 hard-boiled large eggs, sliced
• 3 pouches (2-1/2 ounces each) light tuna in water
• 2 medium tomatoes, chopped