Fruit is widely regarded as a healthy food — but is there such a thing as too much? In a recent video, a Harvard researcher sets out to explore the nutritional nuances of this popular food group ...

Add lime juice to bring out the flavour of pitaya and combine with other tropical fruit such as watermelon, lychee, rambutan and star fruit in fruit salads or fruit drinks.

Serve Michel Roux's fruit tarts alongside a selection of other cakes and sandwiches cut into triangles for a fancy afternoon tea. Equipment: You will need 10cm/4in tartlet cases or barquette tins.