Roast Sweet Potato with Oregano, Feta Cheese and Charred Lemon

Confession – I forgot to put the lemons into the dish before we took the photograph, because I’d forgotten to write them into the ingredient list – now amended. It happens. You should definitely try to remember to put them in, though, as the baked lemon gives a really lovely flavour to the potatoes and feta cheese, plus you can squash them down and they form a sort of instant, sharp dressing.