2 tsp freshly chopped thyme leaves
85g/3oz plain flour
1 tsp mustard powder
85g/3oz unsalted butter, plus extra for greasing
75ml/2陆fl oz double cream
4 large free-range eggs, separated
175g/6oz goats' cheese, crumbled
550ml/8陆fl oz full-fat milk
30g/1oz pecorino, grated