This is one of those sloppy two-handed sandwiches for which you need a stack of napkins and a hearty appetite because there ...

This sauce goes bonkers with any grilled meat like steak, pork chops, lamb, chicken, even fish. Plus, it will keep quite happily in the fridge for a good few days.

Marcus Wareing serves his smoky-sweet barbecued steak in a crunchy baguette, with a homemade herb sauce for company. For this recipe you will need a food processor and a barbecue or large griddle pan.