Cut the sliced bread into quarters.

In a bowl, whisk together the egg, milk, and sugar until well combined.

Add the matcha latte mix (or matcha) to the mixture and blend until smooth.

Place the bread pieces into the batter, ensuring each piece is fully soaked.

Heat margarine (or butter) in a frying pan over low to medium heat.

Carefully place the soaked bread pieces into the hot pan.

Cook each side of the bread until golden brown, gently flipping with a spatula.

Remove from pan when both sides are browned and cooked through.

Serve immediately.