Make the most of tomato season with this ultra-summery pie. Layers of courgette, peppers, potatoes, and roasted tomatoes are paired with punchy feta cheese and a homemade pesto, all nestled into flaky puff pastry and baked until golden. This is delicious served with a refreshing courgette salad, and perfect eaten warm or cold.
Preheat the oven to 200°C/180°C fan/gas mark 6
Toss the sliced tomatoes in a tablespoon of olive oil, season well, and arrange in a single layer on a baking tray
Roast for 20 minutes, then set aside to cool
Gently sweat the red onion in a little oil over a low heat until soft and golden, around 10–15 minutes
Meanwhile, boil the sliced potatoes for 8 minutes until just tender, then drain and cool
Blitz all the pesto ingredients in a food processor until you have a loose, spoonable pesto. Set aside
Reduce the oven to 180°C/160°C fan/gas mark 4
Line a 20 × 30 cm traybake tin with parchment, leaving some overhang to help lift the pie out later
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 over the pastry base. Layer in the vegetables: begin with courgette, then peppers, roasted tomatoes, onions, crumbled feta, potatoes, and peas, drizzling pesto and seasoning between each layer
Set aside 2–3 tablespoons of egg for glazing, then pour the remaining egg mixture gently over the filling
Lay the ready‑rolled pastry sheet over the top, trim and seal the edges, then brush with the reserved egg
Sprinkle over sesame seeds and lightly score into 12 portions
Bake for 1 hour 20 minutes until deep golden and crisp. Allow to cool completely before slicing
Stir together all the dip ingredients and chill until ready to serve
Toss the courgette ribbons with lemon zest and juice, olive oil, honey, salt, and torn basil. Chill until serving
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