I'd like to make Japanese pancake sandwiches with red bean filling (aka
dorayaki), one of my most favorite snacks ever! I've got the pancake
precursor, I've got the filling... How do I make perfectly uniform
pancake circles?

I saw ring-shaped egg-poaching/pancake-shaping templates that you put
in the frying pan, but I wonder if there isn't some other (cheaper)
alternative to making consistent size circles (and doesn't require me
to eat 8 cans of tuna fish). How can I masterfully freehand pour the
exact volume of batter again and again and not buy a needles piece of
kitchen equipment?

TIA for your thoughts,

June