The government released a whole pile of food related PSAs at the time, telling people about substitutions they could make, thrifty ways to stretch rations further or clever recipes that used food they could get easily in place of using imports.
The "Ministry of Food" put in a ton of work. I've got a cookbook that recreates a lot of their material. It's very carrot-heavy!
Yeah, but I'm a cripple who can't drive. It's a tad more complex when you're me