Preheat the oven to 170°C/325°F/gas mark 3.
Cream the coconut oil or butter and sugar together in a food processor.
Add the eggs one by one, mixing well each time, and stir in the orange zest.
In a bowl, mix the ground almonds, baking powder, bicarb and vanilla seeds together. Then pour this into the wet mixture and process.
Mix the plums with the maple syrup
Grease the tin with butter or coconut oil and lay the glazed plums
pour the batter over the top and bake for an hour