Both kale and winter cabbages such as Cavolo Nero (black cabbage) are a very handy ingredient for seasonal eaters as it is one of the few green vegetables that is more abundant and flavourful during the coldest months of the year. It can be substituted for cabbage or spinach and makes a fine side dish when blanched and sautéed with garlic (a little soy and a sprinkling of chopped, roasted nuts is a lovely addition).