Heat a large skillet over medium-high heat. Add the sunflower seeds and toast them for 3 to 4 minutes, or until they’re golden brown and smell fragrant.
In the same skillet you used for toasting the seeds, add the finely chopped garlic cloves, coriander and cumin seeds, smoked paprika and olive oil. Cook the spices and garlic over a medium-high flame for 1 minute.
Add the onions, pepper and salt to the skillet, give it a good stir, and turn the heat down to medium-low. Cover the skillet with a lid and let the mixture cook for about 15 minutes, or until the onion and pepperbits are soft and slightly caramelised. You should check the skillet every 5minutes to avoid burning the mixture – if the latter seems dry, add up to 2tablespoons of water each time you check it out.
Once the onion mixture has been cooked and cooled down, add half of it to the bowl of a food processor. Add the beans as well. Pulse a few times, or until you get a sticky but consistent paste.
Transfer the bean and onion mixture to a bowl. Add the buck wheat flakes and incorporate well using a wooden spoon. Add the chopped green olives, toasted sunflower seeds and coriander as well. Mix again. You’ll end up with a slightly moister mixture, but it should still be possible to make patties out of it. To make the job easier, wet your hands with cold water and shape the mixture into 6 burgers (or more, depending on the size you choose).
Heat 1 tablespoon of oil, over a medium flame, in a large skillet. Add the patties and cook them for 3-4 minutes on each side. Serve with your favourite condiments and fixings or as suggested above.