Our frozen spinach comes in big pellets like something you would put in a wood stove
I've seen the frozen spinach bags in the shop's website, but thd picture shows loose leaves of lettuce, and I've never bought it to investigate further, so thanks. I could probably figure out how to translate those frozen pellets into the block.
I have a vague memory that we used just steam them and then pull the leaves off and dip in mayo and pull through your teeth.
This is how we did it, too. Except I think my dad straight up boiled them, rather than steaming them. I don't even remember my parents' house having any sort of steaming setup until my little sister (9 years and 3 weeks younger than me) got a saucepan/steamer basket set when she was in her teens.
I'm not sure what we did when we got to the hearts when I was kid, but I feel like there was a point when we stopped eating the leaves before reaching the middle. And then years later I found myself buying rather expensive tins of the things I thought we just threw away when I was growing up.