500g/1lb 2oz small cauliflower florets, cut in quarters
250g/9oz courgettes, trimmed, cut lengthways into 1cm/陆in slices
250g/9oz green beans, trimmed, cut into 1.5cm/鈪漣n pieces
3 onions, chopped
1 heaped tbsp English mustard powder
1 tsp dried chilli flakes
25g/1oz cornflour
1 tsp ground ginger
100g/3陆oz fine sea salt
250g/9oz granulated sugar
1 heaped tbsp ground turmeric
300ml/10陆fl oz malt vinegar
300ml/10陆fl oz white wine vinegar