Despite flat sales over the past five years, there are pockets of strong growth in the $53 billion U.S. frozen food sector, and paying strict attention to emerging consumer demands just might turn things around. Frozen entrees/meals remain the largest frozen food category, per Nielsen, with sales of $10.3 billion for the year ended (Y/E) Oct. 29, 2016. Shrimp, side dishes, sweet goods, meat substitutes, fruit, and breakfast entrées were among the fastest-growing frozen categories for the …