Na'ama's Fattoush From 'Jerusalem'

Ingredients

• scant 1 cup / 200 g greek yogurt and 3/4 cup plus
• 2 tbsp/200 ml whole milk, or 1 2/3 cups/400 ml buttermilk
• yogurt and milk)
• 2 large stale turkish flatbread or naan
• 250 g in total)
• 3 large tomatoes
• 380 g in total), cut into
• 2/3-inch/1.5 cm dice
• 3 oz/100 g radishes, thinly sliced
• 3 lebanese or mini cucumbers
• 250 g in total), peeled and chopped into 2/3
• inch/1.5cm dice
• 2 green onions, thinly sliced
• 1/2 oz/15 g fresh mint
• scant 1 oz/25 g flat-leaf parsley, coarsely chopped
• 1 tablespoon dried mint
• 2 cloves garlic, crushed
• 3 tablespoons freshly squeezed lemon juice
• 1/4 cup/60 ml olive oil,
• plus extra to drizzle
• 2 tablespoons cider or white wine vinegar
• 3/4 teaspoon freshly ground
• black pepper
• 1 teaspoon salt
• 1 tablespoon sumac or more
• to taste, to garnish