Mojo de ajo is one of my favourite Mexican sauces. Garlic, and lots of it, is poached very gently in oil with thyme and a hint of smoked chipotle chilli for flavour and warmth; after about half an hour, the garlic turns soft, sweet and irresistibly good. The sauce is versatile, too, making a beautiful marinade for grilled meats and also wonderful on roast vegetables or blanched green leaves.