Open Greek-style salad sandwiches - Good Food Middle East

Ingredients

• 125g feta
• 120g thick natural yogurt
• 2 garlic cloves, finely grated
• 2 medium tomatoes, seeds removed, finely chopped
• 200g cucumber, finely chopped
• 10 pitted black olives, roughly chopped
• ½ red onion, thinly sliced
• 1 tbsp finely chopped mint, plus extra leaves to garnish
• ½ lemon, juiced
• 8 thick sourdough slices