medium carrots, peeled • celery • large onion, peeled • medium potato, peeled • small parsnip, peeled • medium leek • small courgette, cut in half lengthways • a small spring cabbage or, more authentically, cavolo nero, chopped into 1 cm pieces • green beans, cut into 1 cm lengths • fresh peas, or frozen if fresh aren’t available • coarsely chopped flat leaf parsley • × 400 g can of borlotti, haricot, or flageolet beans (your choice), drained and rinsed •