Mary Berry’s Potato Salad with Salmon and Prawns is made with baby new potatoes, olive oil, Dijon mustard, caster sugar, white wine vinegar, mayonnaise, spring onions, radishes, celery, flatleaf parsley, salmon fillets, lemon, and cooked tiger prawns. This delicious Mary Berry Potato Salad recipe creates a tasty side dish that takes about 45 minutes to prepare and can serve up to 6-8 people.