Frozen food wasn't always popular, but it has become an almost $300 billion industry

From frozen pizza to Eggo waffles to Trader Joe's, frozen food has taken over the grocery store. But frozen food wasn't always this popular. There was a time when Americans bought only a couple of pounds of frozen food per year. The breakthrough that gave us frozen food was pioneered by Clarence Birdseye. But what started out as frozen peas and fish has grown to an almost $300 billion industry.