Add the soy chunks, water, salt, and soy sauce to a saucepan.

Bring the mixture to a boil over medium-high heat.

Simmer the soy chunks until all the liquid has been absorbed or evaporated, about 10 minutes.

Peel and finely chop the onion and parsley.

Transfer the cooked soy chunks to the blender with the chopped onion, ground cumin, paprika, ground coriander, ground cinnamon, and tomato paste.

Pulse the mixture 3 to 4 times until it is coarsely minced and holds together.

Transfer the soy mixture to a mixing bowl and stir in 4 to 5 tablespoons of all-purpose flour and the chopped parsley.

Mix until the dough is cohesive and can be shaped without crumbling.

Shape the mixture into 12 small oval köfte or finger-shaped cevapcici.

Heat the vegetable oil in a frying pan over medium heat.

Fry the köfte in the hot oil until golden brown on both sides, about 6 to 8 minutes total.

Serve the vegan köfte hot, optionally with vegan tzatziki.