There's no reason why delicious treats like cookies can't help you rack up your plant count with some healthy seeds and lovely spices - and chocolate! I love the specific combination of ginger and cardamom with chocolate, but you can use a teaspoonful of mixed spice if that's more convenient.
Based on 12 servings, adjust as needed.
Preheat the oven to 180°C/160°C Fan/Gas 4. Line a baking sheet with baking paper.
Melt the butter and sugar together in a small saucepan over a low heat, stiring often until well blended. Take off the heat and leave to cool a little.
In the meantime, if using cardamom pods, bash the pods with a rolling pin to release the seeds then use a pestle and mortar to crush these. Discard the broken pods and use the crushed seeds.
Mix the flour, oats, seeds, ground ginger and cardamom together and stir into the melted mixture until evenly blended. If the mixture is still warm, leave it to cool for a few more minutes before adding the chocolate (so the pieces don't melt). Stir to distribute the chocolate through the cookie batter.
Take dessertspoonfuls of the mixture and place on the lined baking sheet, leaving a 3-4cm space in between as they will spread a little on baking. Use the back of the spoon to flatten each cookie into a rough circle, no more than 1cm deep. (I aim for 12 fairly small cookies.)
Bake in the oven for 12-15 minutes, depending on size, until the cookies are turning golden, and are more deeply coloured at the edges. They'll still be a bit soft at this point: leave to cool completely and crisp up before removing from the tray.
You can store the cookies in an airtight container for up to a week - good luck with keeping them that long!