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Blitz the whole beetroot, ¾ of the chickpeas, 2 tbsp pesto and 1 tbsp oil in a food processor with some seasoning until you have a thick, smooth hummus. Heat the ciabatta following the pack instructions.
Fry the remaining chickpeas in a little oil until crisp, then set aside. Toss the salad leaves with the remaining pesto and a splash of vinegar. Slice the rolls, then assemble the sandwiches with the hummus, beetroot slices, salad leaves and fried chickpeas.