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In a hot wok or wide-based frying pan, heat the vegetable oil. Once smoking, add the banana shallots and runner beans, and stir-fry for 2 mins.
Add the hazelnut oil and hazelnuts, and fry for a further 30 secs, then remove from the heat. Add the lemon zest, a good twist of black pepper and the cheddar, and toss together. Serve as a tasty side.