This Slimming World Summer Mackerel Salad is a light and refreshing dish that is perfect for the warmer months. The salad features fresh mackerel fillets, mixed salad leaves, cherry tomatoes, cucumber, and red onion. The mackerel is grilled to perfection and served on top of the salad for a delicious and healthy meal. The dressing is made with lemon juice, olive oil, and Dijon mustard, adding a tangy and zesty flavor to the salad. This recipe is low in calories and packed with nutrients, making it a great option for those looking to slim down for summer.