1 carrot, peeled and roughly chopped
2 sticks celery, roughly chopped
1 tbsp finely chopped chives
2 courgettes, julienned
1 onion, roughly chopped
2 white onions, thinly sliced
1 bunch thyme
100g/3½oz plain flour
1â2 tbsp plain flour
1 bay leaf
1 tsp whole black peppercorns
100g/3½oz caster sugar
3 tsp coriander seeds
1 tsp cumin seeds
2 tbsp mustard powder
1 tbsp black mustard seeds
pinch sea salt
1 star anise
1 tsp turmeric
300ml/10fl oz malt vinegar
4 slices white bread
100g/3½oz unsalted butter
2 free-range eggs, beaten
100g/3½oz gruyère, finely grated
200ml/7fl oz full-fat milk
1 ham hock
150g/5½oz béchamel sauce
200g/7oz panko breadcrumbs