50ml/2fl oz freshly squeezed lemon juice (about 1–2 lemons)
2 unwaxed oranges, finely grated zest only
2–3 fresh thyme sprigs, leaves picked and finely chopped
200g/7oz granulated sugar
100g/3½oz unsalted butter, cut into small pieces
2 large free-range eggs
2 large free-range egg yolks
150ml/5fl oz freshly squeezed orange juice (about 2–3 oranges)