2 heads baby gem lettuce, leaves separated
200g/7oz broccoli, cut into florets
150g/5½oz Tenderstem broccoli, boiled until just tender
150g/5½oz romanesco broccoli, cut into florets, boiled until just tender
200g/7oz cauliflower, cut into florets
2 leeks, sliced
1 lemon, juice only
1 tsp Dijon mustard
1 tsp English mustard
50²µ/1¾´Ç³ú plain flour
1 tsp Worcestershire sauce
3 tbsp olive oil
1 tbsp sherry vinegar
50²µ/1¾´Ç³ú unsalted butter
200g/7oz cheddar, grated
150g/5½oz Lincolnshire poacher cheese, grated
450ml/16fl oz whole milk
½ loaf brioche, cut into 2cm/1in cubes