Preheat your oven to 250C (480F). Trim the stalks and discard the bean stalks then halve the beans lengthwise. It’s a bit fiddly but worth it.

Toss beans in a little oil and place on a baking tray lined with paper. Bake for 15 minutes (stirring half way through) or until tender and really well browned.

Meanwhile, heat a little oil in a wok or frying pan and stir fry the beef and chilli on a really high heat until the beef is well browned.

Remove beef from the heat. When the beans are ready, stir in beans, soy sauce and mint (if using). Taste and season with more soy if needed.