Miso-marinated beef skewers with grilled vegetables and soy beef broth

By Matt Tebbutt From Saturday Kitchen Ingredients For the beef 100g/3½oz miso 2 tbsp mirin 2 tbsp sake ½ tbsp ground black pepper 2 garlic cloves, minced 1 tsp minced fresh root ginger ½ tsp sugar 500g/1lb 2oz thick-cut sirloin steak, cut into cubes …