1 large shallot, chopped
150g small cherry tomatoes, halved, or 3 medium tomatoes, deseeded and chopped
3 tbsp tomato ketchup
2 tbsp Worcestershire sauce
1 tbsp grain mustard
juice of 1/2 lemon
1 tbsp balsamic vinegar
1 tbsp olive oil
small handful tarragon leaves, finely chopped

1 large shallot, chopped 150 g small cherry tomatoes, halved, or 3 medium tomatoes, deseeded and chopped 3 tbsp tomato ketchup 2 tbsp Worcestershire sauce 1 tbsp grain mustard 1 tbsp balsamic vinegar 1 tbsp olive oil

Mix everything together. This can be done the day before, then kept covered in the fridge until required. Remove the sauce from the fridge at least 30 mins before serving.