Whip eggs with sugar and vanilla sugar.
Add oil and yogurt - mix.
Mix flour with baking powder and cocoa, sift through a fine sieve, add the egg and weight - yogurt and mix gently.
Dissolve the chocolate in a water bath - add to cake with peanut butter - mix.
Transfer the mixture into a circular mold (25 cm) put strawberries on the top.
Bake in preheated oven to 170C for 35-40 minutes.