Microwave the batter for 1 minute and 30 seconds, soak the bread with stevia sugar syrup, and enjoy with yogurt on top.
Mix Greek yogurt, mascarpone cheese, and stevia well to make the cream.
Combine matcha powder, water, and stevia to make matcha syrup.
Slice whole wheat or oatmeal sponge cake thinly.
Lay the sponge cake in a container and soak generously with matcha syrup.
Spread the yogurt cream on top.
Repeat steps 2-3 times, then sift matcha powder on top at the end.
Let it refrigerate for at least 1 hour before serving.