Boil the soya chunks for few minutes. Strain it and squeeze out all the water. Add it in a food processor and pulse till it looks like granules. (Skip this part if you are using Soya granules)
In a pan add some oil, add in garlic& let it sit for 10 minutes on a very low flame till the garlic turns light golden.
Add in the chopped spinach and turmeric powder.(Turmeric powder enhances the green color).
Add in coriander and green chili. Cook the greens until the water has completely evaporated.
Cool for sometime. Add the cooked garlic and spinach in a blender and make a fine paste.
In a bowl add in the soya granules, garlic and spinach paste, boiled and mashed potato, all seasonings and 1 tbsp of corn starch
Mix it properly and make small ball and flatten them slightly.
Mix the bread crumbs and remaining corn starch. Roll the patties in it, coat it properly.
Heat and grease a non-stick pan with some oil and cook all the patties till they turn golden brown in color from both the sides.
Serve it hot with tomato ketchup or chutney.