Mix half the chopped herbs with the yoghurt in a nice bowl, cover and refrigerate.
Place onion, lemon juice, garlic, cumin, chilli, and remaining herbs in food processor and chop finely. Empty into large mixing bowl with the grated lemon rind.
Place drained chickpeas in food processor and process. Add to onion and spice mixture.
Press excess moisture from the tuna and add to chickpeas.
Lightly beat the eggs and mix well into the tuna and chickpeas.
Season to taste.
Shape mixture into approximately 12 - 14 patties and dust lightly with seasoned flour. Place on flour dusted plates and refrigerate for about 30 minutes if possible (this helps to prevent the patties from breaking apart during cooking).
Heat oil in large frying pan and fry the patties 3 minutes each side (a total of 6 minutes).