Cut the mugwort bread into bite-sized pieces.
Mix black sesame powder, low-sugar red bean paste, soy milk, erythritol, and egg whites thoroughly.
Place the cut bread in a bowl and pour the mixed batter over it.
Let the bread soak in the batter for 10 minutes so it absorbs well.
Line a pan with parchment paper and pour in the mixture.
Bake in a preheated oven at 180°C for 20 minutes.