I would manage terribly!
I am the grand-daughter of two people who farmed the land until their retirement--they had huge family farms until their 20's, then farmed their own backyard garden between their 30's and 60's. I helped in the digging, the sowing and the picking of the harvest (mostly long beans). But I never learned the how and when to do so! I was an unskilled laborer for them. Now, in my late 40's, I do nothing more with my yard than mow the lawn and trim the hedges. I would love to have my own garden, but I don't know how to go about it.
Food rationing would drive me nuts. I have specific foods I need to have to feed my family best.
The above is from Wikipedia. (Argue with me all you like about Wikipedia not being a reliable source, I don't mind. It's good enough for this discussion in my opinion.) It seems to be in line with what my grandmother tells me about rationing.
I can easily live without bacon, butter, sugar, meat, biscuits, cheese, eggs, lard, milk and dried fruit. I would find it unfortunate to live without tea (particularly hibiscus tea and green tea). If oat bran is considered "breakfast cereal", then I'd be at a huge loss! We eat about 3 cups of oat bran weekly (I make oat bran muffins for breakfast).
The biggest loss I'd feel is the loss of fresh vegetables and fruit. If potatoes were part of that rationing, I think we'd nearly die! We all need carbohydrates for energy.
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My grandmother tells a story about her experiences with rationing during the war. She lived in Florida with my grandfather who was stationed there. She worked at a deli/sandwich shop and at a grocery store. Her mother and father were still on the farm in Missouri and had food aplenty. One day, my grandmother wrote home and said how much she would love to have some of the onions from the harvest that year--onions, of all things, were very hard to come by. A week or so later, her parents shipped her a huge box of onions! She took a few in with her to work and gave them to her co-workers. She said her boss took the onion and put it in his coat pocket--wearing it the rest of the day. She said he called home and asked his wife not to cook dinner, he was going to surprise her with "hamburgers with ONION!" Well, according to my grandmother, the wife's glee could be heard through the telephone line!
Can you imagine? The excitement over a single onion!
Let us hope and pray we never have to be excited over an onion.