1Lay the shredded mozzarella on a plate and dot it with a few drops of each food coloring.
2Swirl the colors gently through the cheese with a toothpick to create a marbled rainbow effect.
3Butter one side of each bread slice.
4Assemble the sandwich: place the cheddar on the unbuttered side of one slice, pile on the rainbow mozzarella, then close with the second slice, buttered side facing out.
5Cook in a skillet over medium-low heat for 3–4 minutes per side, until golden brown and the cheese is fully melted.
6Slice diagonally, let cool for a minute, and pull apart to reveal the rainbow before devouring.
Recipe Lineage
The family tree of this recipe — trace every fork back to the original.