Mix the flour, zest from lemon, sugar and baking soda together. Add the oil and mix until a crumbly dough forms. Put this in the fridge for 30 minutes.
Mix the fruit with the starch. I used strawberries, raspberries, and blackberries.
Use a rectangular oven tray (20cmx30cm). Cover the base with a baking sheet.
Add half of the dough to the oven tray and cover the base with it. Press it down, not too firmly.
Add the fruit on top.
Mix the dark brown sugar with the other half of the dough and crumble this over the fruit layer. Make sure everything is covered.
Spread the coconut on top.
Bake in the oven at 180 degrees for 40 minutes until golden brown. Let cool down for at least two hours before cutting.