I grew up in Poland in the 00's, so long after the transformation and I would already know actual pizza ("actual" meaning that my favorite pizza was ground meat with garlic sauce and caraway in a pizzeria that was likely one of the first ones that opened in my hometown), but I do recall recipes that were remnants of the older time. My mom got a "pizza" recipe from an elderly friend, and this "pizza" was basically a sauerkraut quiche with cheese and ketchup on top. I think that everyone there has a family recipe that was named after some foreign food, but is in fact only vaguely similar to the original - for example one friend of mine brought "Saigon rolls" to a party, and these were just crepes stuffed with mushroom filling typical to our cuisine.