Sweet potato and Parmesan seem, to me at least, a match made in culinary heaven. Definitely ‘fusion food’ when put together (Italians aren’t known for using sweet potato), they carry each other – and each other’s flavours — so well. Fresh peas are one of summer’s highlights (along with swimming in a river and eating a fresh mango in the sea), but if you can’t get fresh peas then don’t feel bad about using frozen ones – often they’ll be frozen within hours of being picked, so buy a good bran