More than 100,000 consumers will be given the opportunity to road test sweet potatoes as part of the travelling road show.
Tasters will be given a McCain coupon book including three 50p coupons.
A competition, where entrants describe their perfect dinner party with a prize of a celebrity chef cooked dinner awarded to the best, will also be launched.
@tnasolutions launches new #Arabic website http://t.co/PGubzaSc41
#Agriculture Ministers to strengthen #EU policies for young farmers @_CEJA_ hails the conclusions http://t.co/jO1iEBG8ex