1 garlic clove, crushed
1 small leek, finely chopped
150g/5陆oz baby spinach
freshly ground black pepper
1 tbsp sesame seeds
knob of butter, plus extra for greasing
50驳/1戮辞锄 butter, melted
4 filo pastry sheets (each sheet measuring 25x45cm/10x18in)
6 good-quality pork sausages (about 500g/1lb 2oz total weight)