Fun story (semi related) she visited us in the US in 2015 and my sister served her kale. She amusingly said: “I haven’t had this since ww2” apparently when food was scarce they grew kale which was easy to grow in Poland and packed with nutrients
A lot of the more recent examples of Polish cuisine are dishes originally invented out of poverty and made largely out of cheap ingredients and which now took a new form using stuff unheard of at the time because the real recipe is not to contemporary taste.
My favourite example of that would be cold cheesecake - originally made largely from cottage cheese, nowadays has mascarpone as the main ingredient.
Mascarpone! Hardly anyone knew what mascarpone even was in the 70s.
Behind the Iron Curtain and no trade with the Decadent Bourgeoisie Westerners