Avocado Salad Flatbread Sandwich Recipe from USA | Ingredients: white wine vinegar, garlic, salt, ol

Ingredients

• 0.75 cup white wine vinegar , divided
• 0.5 tbsp fresh garlic , finely chopped
• 1.22 tsp salt and freshly ground black pepper
• 1 cup olive oil
• 2 cup sweet onion , chopped
• 2 cup diced tomato , chopped
• Flatbread, such as pita , 24 rounds, about 7 inches diameter
• hearts of romaine leaves—as needed
• 12 oz (340 g) shaved romano cheese *
• 6 lb (2.72 kg) california avocados
• Jack or fontina cheese in 1 oz (28 g) slices may be substituted