Listening to NPR this morning, I heard a reference from an New Zealand film to ‘burger rings’.
What’s a burger ring? I googled it, and there are apparently metal rings to make round burger patties. (Why would you need a tool to do that? ) This utensil seems an odd thing to mention given the dialogue (which I don’t clearly remember). Do ‘burger rings’ have a different meaning in Enn-Zed?
I can see shaping burgers inside a ring. Makes nice, uniform patties that can be frozen and slapped on a grill. I have something like that at home, but it’s a cylinder with plastic disks to keep the patties separate.
Eggs can also be fried inside a metal ring. Keeps them from running over the bottom of the pan. This is how they make Egg McMuffins.
My mother has a tool for making hamburgers which is a plastic round ring with two identical plastic lids. You put a lid as the bottom, place the meat in the box thus formed, press on it with the top and voilà, perfectly round patties.
Many butcher shops have the heavy-duty version: it’s metal, makes two patties (which may be oblong or round), and the lids aren’t pressed by hand but with a lever. Searching for burger shaping machine tends to give me industrial versions, but máquina de hacer hamburguesas brings up small-scale and industrial both.