Raw and Cooked Salad - Lidia

Ingredients

• 1 pound sweet onions such as Vidalia or Walla Walla
• ¾ pound red bliss potatoes (3 to 6 potatoes, depending on size)
• 1/2 pound fresh green beans
• ½ cup extra-virgin olive oil or as needed
• ½ teaspoon coarse sea salt or kosher salt or to taste
• 1/2 cup black olives, pitted
• 3 tablespoons small capers, drained
• 1 or 2 fresh ripe tomatoes (about ½ pound), cored and cut in wedges
• 1 or 2 heads of bibb lettuce (about 3/4 pound)
• 3 tablespoons red wine vinegar
• Freshly ground black pepper to taste