1 garlic clove, crushed
6 gherkins, thinly sliced
150驳/5陆辞锄 caramelised onion relish, from a jar
2 tbsp chopped flatleaf parsley leaves
60驳/2录辞锄 spinach leaves
1 tbsp chopped fresh tarragon leaves
1 tsp Dijon mustard
150驳/5陆辞锄 mayonnaise
1 tbsp Worcestershire sauce
salt and freshly ground black pepper
70g/2陆oz fresh white breadcrumbs
1 tbsp tomato pur茅e
150驳/5陆辞锄 mature Cheddar, thinly sliced
2 tbsp whole milk
500g/1lb 2oz beef mince
12 thin slices round pancetta
6 ciabatta or crusty bread rolls, halved