You're Really Relying on Root Crops as Your Staples?

Orlando, Florida is not a grain place. But we are blessed with being a great place for tubers. I calculated that you can pretty much grow a year's supply of yuca for one person in a fraction of a reasonable size yard. The other is sweet potatoes. I grew over 400 pounds of sweet potatoes in a little patch that was less than 10 feet wide by 20 feet long,. So we're talking 200, wait, is that 200 square feet? 10 by 20? Yeah. That's 100 day supply of calories from that little 200 square foot patch. If there's anyone out there listening to this that knows if there's ways to keep yuca from being glassy or