Cacio e pepe with runner beans
Cacio e pepe or "cheese and pepper" is a Roman classic – an easy pasta sauce that uses pasta water for silky texture. Runner beans add freshness and bite
Heat a large, deep frying pan over a medium-low heat. Melt the butter until foaming, then scatter in the leeks. Cook for 20-25 mins until completely softened.
Meanwhile, bring a large pan of salted water to the boil, then add the pasta and cook until al dente, saving a mugful of pasta water (roughly 170ml). Turn the heat up slightly on the pan of leeks, and sprinkle in
1 tsp black pepper and the garlic. Cook for 3-4 mins until fragrant, then add the pasta to the pan, along with the cheese and reserved pasta cooking water.
Mix well, tossing until the sauce is creamy and emulsified. Serve with more black pepper and cheese sprinkled over the top.