World's Best Potato Salad

Details

Ingredients

• 6 medium potatoes
• 1 small onion, finely chopped
• 1 cup celery, chopped
• 1 teaspoon salt
• 6 hard-cooked eggs, diced
• 2 eggs, beaten
• ½ cup white sugar
• 1 teaspoon cornstarch
• salt to taste
• ½ cup vinegar
• 1 (5 ounce) can evaporated milk
• 1 teaspoon prepared yellow mustard
• ¼ cup butter
• 1 cup mayonnaise