A brand name for kale sprouts, formally known as flower sprouts, kalettes were developed in England and first sold commercially in 2010. Each pretty kalette is a cross between kale and a Brussels sprout, and highly nutritious - particularly rich in vitamins A and C. Cooking-wise, kalettes work in any way that Brussels sprouts and kale would be happy with: steaming, frying, roasting or stir-frying.