1 tsp lemon juice
1 onion, peeled
few sprigs thyme
2 bay leaves
salt and cracked black pepper
4 cloves
freshly grated nutmeg
100²µ/3Β½΄Η³ϊ butter
100ml/3Β½fl oz double cream
700ml/1ΒΌ pint full-fat milk
6 croissants (leftover slightly stale croissants work well)