Tamarind-glazed tuna with watercress and broccoli salad

By Matt Tebbutt From Saturday Kitchen Ingredients For the watercress and broccoli salad 150g/5½oz purple sprouting broccoli or any green vegetable 150g/5½oz Tenderstem broccoli or any green vegetable 100g/3½oz sugar-snap peas or any green vegetable 50g/1¾oz watercress handful pea shoots 1 avocado, peeled, halved, …