World's Best Potato Salad

Ingredients (14)

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