Navel, Valencia and blood oranges are the main types of sweet oranges. They are used in both sweet and savoury dishes, but where necessary add a little lemon juice or zest to strengthen their flavour.

Finely pare strips of aromatic zest from Seville oranges and dry in a cool oven, then use to flavour stews and stir-fries. Replace lemon juice with Seville orange juice in savoury marinades ...