Kohlrabi, cavolo nero, pine nut and tomato stew on sweet potato miso mash from Vegetables: The new f

Ingredients

• 400 g tin of chopped tomatoes, with their liquid
• 125 g butter
• 2 tablespoons soy sauce
• 800 g sweet potatoes, peeled and chopped into large chunks
• 1 kohlrabi, peeled, halved and cut into wedges
• 50 g pine nuts
• 2 large red onions, sliced
• 1 tablespoon rosemary leaves
• 2 tablespoons extra-virgin olive oil
• 1 large head of cavolo nero, to yield 150 g leaves, roughly chopped
• 1 tablespoon roughly chopped rosemary
• 1 tablespoon shiro miso (white miso)
• 2 tablespoons shiro miso (white miso)