A mojo sauce is a mixture of garlic and oil which is often used either as a marinade for chicken or fish or as an accompaniment for meat or fish, rice or potatoes. It is so versatile since you can cook it or just use as a marinade or dip or drizzle over cooked rice, couscous or salad vegetables. It is the perfect way to use Seville oranges, which have a beautifully tart flavour.