This extra special tart with crumbly walnut pastry makes a fabulous vegetarian dinner
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This crumbly, nutty walnut pastry is absolutely delicious, but a bit harder to work with than plain shortcrust. If you're nervous about making your own, simply buy a 500g ready-made pack, roll to a rough rectangle, top with the chopped walnuts, then fold in half and re-roll to line the tin.