Avocado Salad Flatbread Sandwich

Ingredients

 * ¾ Cup white wine vinegar, divided
 * ½ Tbsp Fresh garlic, finely chopped
 * 17/32 tsp salt and freshly ground black pepper
 * 1 Cup olive oil
 * 2 Cups Sweet Onion, chopped
 * 2 Cups Diced tomato, chopped
 * Flatbread, such as pita, 24 rounds, about 7-inch diameter
 * Hearts of romaine leaves -- as needed
 * 12 oz Shaved Romano Cheese*
 * 6 Pounds California avocados
 * * Jack or fontina Cheese in 1-ounce slices may be substituted

Directions
METHOD

To make vinaigrette, whisk together 1/2 cup vinegar, garlic, salt and pepper; whisk in oil. Reserve.

Combine Onion, tomato and remaining 1/4 cup vinegar; reserve.

JUST BEFORE SERVICE

Dice avocado; fold avocado into Onion mixture.

PER ORDER

Brush 1 round of bread with 1 tablespoon vinaigrette. Arrange 1 or 2 leaves romaine, depending on size, in center of bread. Top with 1/2 cup avocado salad; garnish with 1/2 ounce Cheese.