2 heads Little Gem lettuce, leaves separated
2 lemons, zested then cut in half
2 sprigs thyme, leaves only
75g/3oz plain flour
sea salt and freshly ground black pepper
40g/1Β½oz shelled hazelnuts
250g/9oz butter
2 free-range eggs, beaten
25g/1oz parmesan, freshly grated, plus extra for serving
4 chicken breasts, boneless and skinless
40g/1Β½oz Japanese panko breadcrumbs