Prepare rhubarb first: peel it and cut it into pieces. You can play around with preparing sticks of rhubarb for decoration. Make sure to use up all rhubarb pieces. Wash strawberries and cut them into small pieces.
Add both flours, both sugars, and baking powder to a large bowl. Using a whisk, mix them together.
In a separate bowl, mix together yogurt, milk, melted coconut oil, and lemon juice.
Add wet ingredients to dry ingredients and mix together to form a smooth batter. Add fruits to the batter and gently fold them in. In case you don’t have rhubarb or strawberries or either, you can use any other fruit you wish. But you really should try the rhubarb and strawberry combo.
Grease your baking tray and pour the batter in. You can either use a rectangular tray or a circular one for pies or cakes. Decorate with more fruits or rhubarb sticks if you wish.
Bake in a preheated oven at 180°C for 50 minutes.