Take two of the lemons, finely grate the rind from one of them and squeeze the juice from them both. Mix with garlic and olive oil. Season well with black pepper.
Step 3
Cut the tuna in half lengthways, then cut into eight long strips about 2cm (¾in) thick. Lay strips in a shallow dish, pour marinade over and turn the fish to coat. Cover and leave for at least 30min or overnight.
Step 4
Starting at the thinner end of each strip, roll up the tuna and thread on to a skewer, securing ends (don't worry if any strips break - roll them up separately and thread on to the same skewer). Cut the remaining lemon into eight wedges and push one on to each skewer. Put in a sealable container with the remaining marinade, sprinkle with parsley and keep cold.
Step 5
At the beach: lay skewers on barbecue. Cook for 2-3min on each side, brushing with the remaining marinade. Serve with the roasted vegetables and bulgur salad.
An experienced and highly skilled team of food writers, stylists and digital content producers, the Good Housekeeping Cookery Team is a close-knit squad of food obsessives. Cookery Editor Emma Franklin is our resident chilli obsessive and barbecue expert, who spends an inordinate amount of time on holidays poking round the local supermarkets seeking out new and exciting foods. Senior Cookery Writer Alice Shields is a former pastry chef and baking fanatic who loves making bread and would have peanut butter with everything if she could. Her favourite carb is pasta, and our vibrant green spaghetti is her weeknight go-to. Lover of all things savoury, Senior Cookery Writer Grace Evans can be found eating crispy corn and nocellara olives at every opportunity, and will take the cheeseboard over dessert any time (though she cannot resist a slice of tres leches cake). With a wealth of professional kitchen know-how, culinary training and years of experience between them, they are all dedicated to ensuring every Good Housekeeping recipe is the best it can be, so you can trust they’ll work (and if they don’t – we’ll have the answer for why*) every time (*90% of the time the answer is: “buy an separate oven thermometer”!).
