recipe coles helping lower the cost of dinner down down coles australian lamb boneless leg roast crown curtis stone's lamb roast with hasselback pumpkin & balsamic brown butter ingredients 1kg coles australian lamb fat trimmed rosemary 125g butter vinegar method with baking paper keep warm for 10-12 mins or until brown all over lamb with some balsamic brown butter and sprinkle with chopped rosemary the centre of the lamb registers 60°c and the pumpkin is tender and glazed sprigs and remaining balsamic brown butter