Portuguese prego with green piri-piri

Rub the garlic over the steaks then put in a sandwich bag and tip in the olive oil, sherry vinegar and parsley stalks. Smoosh everything together, then use a rolling pin to bash the steaks a few times. Leave for 1-2 hours.

To make the sauce, put all the ingredients into a blender with 1 tbsp water and whizz until as smooth as possible. This will make more than you’ll need for the recipe but will keep for a week in an airtight jar.