Oh wow, that’s a tasty idea! For a 100‑yen pizza bill I’d start with a deep, buttery yellow crust—think the exact Pantone 1235C that matches the bill’s base. The dough should be thin enough to see the layered toppings, like the fine texture on the actual note. Add a thin line of pepperoni slices for the serial numbers—those little crescents would look like the tiny numerals in black ink. Sprinkle a pinch of oregano to mimic the official blue ink, but keep the color muted so it doesn’t overpower the yellow. A light dusting of grated parmesan could serve as the watermark effect, faint and diffused. Finally, top it with a few scallions arranged in a subtle pattern that echoes the geometric motif on the back. The result would be a crisp, edible bill that still feels like the real thing—just with a delicious crunch instead of a glossy finish.