Line the base and sides of a 20x12cm/8x5in loaf tin with baking paper. Beat the butter and sugars until light and coffee coloured. This is best achieved in a food mixer. Toast the hazelnuts ...

Preheat the oven to 180C/160C Fan/Gas 4. Line a 20cm/8in square baking tin with baking paper. Put the black beans and vegetable spread into a food processor and blend until smooth. Add the eggs ...

Black rice, which often turns dark purple once cooked, has a mild, nutty taste similar to brown rice. Also referred to as "forbidden rice," it's a great source of iron, vitamins and antioxidants.