This is very interesting.
I have tried to record what we harvested, but i forget to. I have no idea what we eat. I just can and freeze. I am terrible at keeping records.
But, to plan a garden for self-sufficiency would be very important. Being in zone 4A, we would need a greenhouse or Garden Tower to have lettuces in the winter. Perhaps one small pot each for patio size cherry tomatoes and cucumbers.
That said, I know we are not getting enough from our gardens. Mostly we are ok, but it is the herbs that I have not really planted, and the celery that I have not figures out how to grow, or the onions and potatoes that just do not last through the winter.
There is a lot to learn.