Up-Side-Down Peach-Blueberry Butter-Free Cake

Wholesome, moist and soft cake filled with fresh blueberries and juicy peach slices




What's your favorite summer fruit for baking?!? Is it sunshine sweet and drip-down-your-chin juicy peaches? OR deliciously healthy, anti-oxidants and nutrients packed, cute little blueberries?!? 
Hmm... Because I really couldn't make up my mind, today I used both in this delicate and healthy upside-down cake.