After the Conquest, the Spanish introduced a variety of foodstuffs and cooking techniques, like frying, to the New World. Regional cuisines remained varied, with native staples more prevalent in the rural southern areas and Spanish foods taking root in the more sparsely populated northern region. European style wheat bread was initially met unfavorably with Moctezuma's emissaries who reportedly described it as tasting of "dried maize stalks". On the Spanish side, Bernal Díaz del Castillo complained about the "maize cake" rations on campaign.