Afgani Proverb: "Be Content with Such Things as You Have."

During my ongoing research into the Central Asian Jewish community I came across this supposedly well-known Afghani proverb mentioned in several sites:

If there is only bread and onions, still have a happy face.
The meaning?: "Be content with such things as you have."

This made me think about the Jews during the Exodus from Egypt, as well as those who have had to leave their homes during various persecutions throughout the world over time. If one were to substitute "bread" for matzah, it would make just as much sense, if not more:

If there is only matzah and onions, still have a happy face.
The meaning?: "Make the most of what you have when you have it — (especially during Pesach!)"