Dr Carrot: guardian of health "You need lots of protective Vitamin A," says Dr. Carrot. "Call me in regularly, and I'll guard your health." Carrots are one of the richest sources of Vitamin A; and they're plentiful, thanks to the British farmer. Look out for these carrot recipes— and improve your winter diet! Baked Potatoes with Carrot Sauce For four persons, take 4 large potatoes; 4 large carrots; 2 teaspoonfuls each of mustard, cornflour, margarine, vinegar; salt and pepper to taste and a heaped tablespoonful of dripping.