Peel the potato, wash it thoroughly, and finely chop it.

Place the chopped potato in a microwave-safe container and microwave for 2 minutes and 30 seconds without adding water.

Add the egg, salt, and pepper directly to the cooked potato. Mix well to form a batter.

Heat a pan over low heat and melt a small amount of butter. Pour the batter into the pan and shape it into a rectangle.

Cook the bottom side of the batter until set, then flip to cook the other side.

Place a slice of baby cheese on top of the cooked batter.

Fold the toast in half by cutting it gently in the middle with a spatula and folding it over.