Put the soy milk and Greek yogurt in a bowl and mix well.
Separate the egg yolks and whites, add a pinch of salt to the egg whites, and make meringue.
Add almond flour, baking powder, and sweetener to the Greek yogurt mixture.
Carefully fold the meringue into the batter in several additions.
Pour the batter into a mold lined with parchment paper.
Bake in a preheated oven at 170°C for 30 minutes.
Let it cool, then cut into bite-sized pieces.