Stir eggs and sugar together, then add olive oil and yoghurt. Mix gently. Add flour and cinnamon, mix together to reach a creamy solution. Add baking soda.
Peel 3 apples and chop them in 1cm, mix them together with the cake base gently, avoid to broke the apple chops.
Add the baking soda, mix again.
Put everything in 14" oven plate. Slice the 4th apple and put then slices on top.
Bake for 40 minutes at 200' C.