Chocolate Divine Cake

• 3 egg whites
• 1 wheat flour
• 1 baking potato
• 3/4 sifted stone (ground whole)
• 475 ml nonfat yogurt (plain)
• 200 gr granulated sugar
• 130 gr sifted all-purpose
• 80 ml canola oil
• 45 gr unsweetened cocoa powder
• 30 ml mild honey