Healthy salad with ginger soy dressing

Ingredients

4 baby gem lettuces halved lengthways200g frozen shelled edamame (soy) beans, defrosted4 carrots cut into long matchsticks140g radish thinly sliced2 tbsp rice wine vinegar2 tbsp reduced-salt soy sauce2 tbsp caster sugar½ small onion chopped2 tsp chopped ginger1 tbsp tomato purée2 tbsp vegetable oil

Method