Although traditionally associated with sweet desserts, blackberries also make a great addition to savoury dishes, particularly when paired with earthy seasonal vegetables and punchy cheese. This is a colourful, flavour-packed pie that is perfect for slicing up and taking on picnics.
Preheat the oven to 200°C/180°C fan/gas mark 6
Toss the chopped chard stalks in oil, season, and roast for 15–20 minutes
Fry the sliced red onion in a pan with a splash of until tender and sweet, about 15 minutes
Blanch the sliced potatoes in boiling water for 8 minutes until tender, then drain and cool
Wilt the chard leaves in boiling water for 1 minute, then refresh in cold water. Squeeze dry and chop roughly
For the dressing, whisk together the cider vinegar, honey, mustard and thyme leaves
Toss the blackberries gently in the dressing and set aside
Reduce the oven to 180°C/160°C fan/gas mark 4
Line a 20 × 30 cm traybake tin with parchment
Overlap two of the pastry sheets together by a few centimetres, and then roll them together, using a splash of water to help them stick if needed. Roll out the joined pastry sheets until they are the thickness of a £1 coin, and big enough to line the base and sides of the tin. Press into the tin
Scatter breadcrumbs across the pastry base. Layer in the roasted chard stalks, softened onions, marinated blackberries, wilted leaves, crumbled Wensleydale, potatoes and peas, seasoning well between layers
Set aside a few tablespoons of egg for glazing, then pour the rest gently over the filling
Cover with the ready‑rolled pastry, trim and seal the edges. Brush with egg, scatter with poppy seeds, and score into 12 neat slices
Bake for 1 hour 20 minutes until golden and crisp. Cool fully before lifting out and slicing. While the pie chills, make the remaining components
For the dip, mash the blackberries with the yogurt, honey, vinegar, thyme and a pinch of salt. Chill until ready to serve
Toss the julienned apples with lemon juice, honey, oil, hazelnuts and salt to make the slaw
Serve the pie with the slaw and dip on the side
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