Cut the heart shapes out of 2 of the slices of bread using a larger cookie cutter

With the remaining slice of bread cut two hearts

Butter one side of one piece of bread for each sandwich

Add 1 teaspoon of butter to a frying pan on medium heat

Place the non-buttered side down on the hot pan

Add the cheese

Place the buttered side of the bread facing up

When it has browned on the bottom, flip the sandwich over and brown the other side