Steamed sugarloaf cabbage with lemon and burnt butter

"A Sugarloaf is not just any cabbage though – it’s the adored variety found in Denmark and has a loose-leaf structure more similar to a butter lettuce - it’s sweet, and when charred becomes more interesting. Our Danish chef friend Bente Grysbæk adds a peppery grating of fresh horseradish, her fast version of preserved lemon using just the rind …plus lashings of burnt butter - the result is a taste sensation." Maeve O'Meara, Food Safari Earth