Preheat your oven for atleast 10 to 15 minutes at 200 degrees C.
Wash and pit the plums, roughly chop them into pieces.
Also save some plum slices for garnishing / decorating the cake.
In a clean dry glass bowl, sieve the whole wheat flour twice.
Now add the baking powder and baking soda. Mix well using a whisk. Keep aside.
In another glass bowl, measure and add the olive, coconut milk, vanilla essence and honey. (all the wet ingredients)
Mix well and keep this aside.
Now add the chopped plums into the whole wheat flour.
Add the wet ingredients to the flour mix. Mix well using a spatula.
Pour into a greased cake tin. Spread the batter evenly.
Place the sliced plums and gently press them into the batter to avoid them from falling off while slicing.
Sprinkle the melon seeds. Place this into a hot oven and bake this at 180 Degree C for 35 to 40 minutes.
Once baked, insert a toothpick in the centre to check if its cooked. Allow it to cool completely before removing from the cake tin.