1. Preheat oven to 170c/150 fan. Line a loaf tin with non-stick baking paper. Take out the base and draw around it on the baking paper. Cut out and set aside. Then cut two strips wide enough to just come over the top of the sides of the cake tin. Trim one down, so they both fit around the sides and meet each other just slightly overlapping. Then brush the tin with oil and stick the paper pieces to the tin.
Add nettle tops to a double steamer and steam for around 5 minutes. Add immediately to a cold water bath to stop them cooking and quickly squeeze the water from them. I like to do this before too much nettle goodness is lost to the water that is thrown away. If you don’t have a steamer, simply boil for a couple of minutes and add to the cold water bath.
Add your nettles to a blender and add in lemon juice, and plant milk. Once blended, add in oil and whizz again, briefly, to combine.
In a large bowl, whisk together flour, sugar, bicarb, baking powder, salt and lemon zest. Pour in your nettle mix and stir until well combined.
Pour into your tin and bake for around 45 minutes or until a skewer comes out clean.
Once out of the oven, allow to cool for 5-10 minutes, then remove to a wire wrack to cool completely.
Add the icing sugar, butter, juice and vanilla extract to a large bowl or stand mixer bowl. Start on the lowest speed on your mixer or hand whisk and gradually increase the speed until the mixture is thick and smooth.
If the mixture is too thick, add a small amount of plant milk, a drop at a time. If it's too thin, add more icing sugar.
Spread the first layer on the top and sides of your cake (you can spread in between too if you like) and then put in the fridge for at least 30 mins. This step is best done with a cake spatula or palette knife. If you don't have one any spatula will do.
Take the cake out of the fridge and spread the final layer onto the cake. I like the make long sweeps across the cake as a finishing touch.
Finally decorate with fruit and pretty edible wild things!