Vegetarian recipe ideas
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Heat the oven to 200C/fan 180C/gas 6. Cook the potatoes in a large pan of lightly salted water until just cooked, then drain well. Tip into a bowl with some seasoning, spray with the oil and toss until well coated. Tip onto a non-stick baking tray and roast for 30 minutes, tossing halfway, until golden.
Meanwhile, bring a large pan of lightly salted water to the boil and blanch the green beans for 2 minutes until tender. Scoop out and run under cold water until completely cold. In the same pan, carefully lower in the eggs and simmer for 6 minutes 30 seconds, then drain and run under cold water until cold. Peel and halve.
To make the dressing, whisk together all of the ingredients with some seasoning and 1 tbsp of water.
Arrange the potatoes, eggs, beans, red onion, cherry tomatoes and lettuce in shallow bowls, topping with the tuna. Scatter over the capers, olives and a sprinkling of chives. Drizzle over the dressing to serve.