Looking at the past can bring some tough memories to handle, but there's also a lot to learn from those times. Like you mentioned, everything was prepared from the scratch, and people definitely were using every bit of food they got in hand. Nowadays people are buying a lot of heavily processed food, since it's "easier", and the amount of food waste is really shocking! It's quite depressing to watch.
By the way, I had to google what zakusca is, and it looks and seems really delicious! 😋