Avocado salad

Ingredients

4 Cos lettuce leaves, chopped6 cherry tomatoes halved2 radishes finely sliced2 spring onions finely sliced50g cucumber cut into small cubes25g flat-leaf parsley leaves, chopped25g mint leaves, coarsely chopped1 avocado chopped into chunky pieces½ tbsp sumac (a crushed red, lemony berry; find it in Middle Eastern and Indian markets and online)½ garlic clove crushed1 tbsp lemon juice2 tbsp olive oil

Method