- Preheat the oven to 180 degrees.
- Roll out the puff pastry on a baking tray lined with baking paper.
- Spread the puff pastry with the cheese spread, keeping the edges free.
- Brush the edges with the beaten egg and sprinkle with some poppy seeds and sesame seeds (optional).
- Divide the courgette slices, overlapping, over the cheese spread.
- Bake in the oven for 20 to 25 minutes, until the puff pastry is golden brown.
- Top the baked tart with the smoked salmon, red onion and fresh dill. Serve with a lemon wedge.