Plunge the tomatoes into boiling water, transfer to iced water then peel. Cook the green vegetables separately in boiling salted water then refresh in iced water. Cook the other vegetables using the same method.
Remove the leaves from the flat-leaf parsley, cook them in boiling salted water then refresh in iced water. Apply pressure to remove as much water as possible then blend until smooth. Bring the cream to the boil and season. Blend with the flat-leaf parsley puree until smooth, green and frothy.
Heat the vegetables in butter and season. Place the vegetables with a little flat-leaf parsley cream in front and sprinkle with currants and pine nuts. Serve a sauce boat of flat-leaf parsley cream alongside.