Place your beans, herbs, oil, spring onion greens and (optional) pickled garlic in a food processor and blitz until a paste with very small chunks forms. It won’t hold together just yet – the buckwheat will do that.
If you are making the edamame version, you may need to add up to 60ml (1/4 cup) water to help with blending. Try to add it sparingly and only as needed.
Once you are happy with the consistency, pour the mixture into a small mixing bowl.
Add the cumin, buckwheat flour and baking powder and stir to combine. The mixture should hold together and be the right consistency to make balls of falafel with your hands. If it doesn't, add 5-10g extra buckwheat flour (be sparing as too much flour will make them pasty and dry).
Add the salt sparsely, carefully and to taste. I find this falafel mixture becomes too salty very easily (coming from someone who loves salt). I would recommend adding 1/8 or ¼ of a teaspoon, mixing thoroughly and tasting. If it tastes bland and like nothing, add a little more salt. If it tastes full flavoured, stop adding more salt. Add pepper to your tastes.
Use oiled hands to form the mixture into 10 X 1 tablespoon sized balls. Note: 1 Australian tablespoon is 4 teaspoons elsewhere.