Tagine is based on the principle of ultra-slow cooked meat, but a vegetarian version, using whatever vegetables are in season, is occasionally made for a light supper.
Peel and thickly slice the onions. Trim the courgettes, trim and peel the carrots and turnips, peel or scrub the potatoes, and roughly chop all these into medium-sized chunks. Top and tail the green beans.
Heat the vegetable oil in a large, deep saucepan and add the mixed vegetables, ginger, pepper, salt, tomato purée and chopped parsley, then add half the wate