Fattoush

Name: Fattoush
Ingredients: 150ml buttermilk; punnet of cherry tomatoes, cut into halves; 100g radishes, thinly sliced; 1 cucumber, quartered and diced (approx 1.5cm); 1 bunch of spring onions, thinly sliced; 15g fresh mint; 25g flat leaf parsley; 1 tbs dried mint; 4 garlic gloves; 3 tbs freshly squeezed lemon juice; 30ml virgin olive oil; 2 tbs cider/white wine vinegar; 1 tsp coarse ground black pepper; 11/2 tsp sea salt; 1 tbsp sumac