Very clever and fun! I did not get the mechanism at first (I thought the super-sized entries were "hanging off" the edge) but once I did a check, it became clear.
Toppings on this puzzle were tricky until I got down toward the crust when everything unlocked with a great AHA. Impressive work given the constraints!
Man, this was so good. I was super stumped for a while, I was like... I KNOW what goes in here... but I'm always one letter box short! Once I figured it out, it was off to the races.