Heat enough oil in a deep pan and deep fry the potatoes till crispy and cooked through. Set aside.
Heat 3 tbsp oil in a large non-stick wok and add in ginger and garlic. Fry for a few seconds till fragrant before adding in the chopped onions and peppers. Fry for couple of minutes till the onions start to lightly brown.
Add in the spices, soya sauce and salt, and mix well.
Toss in the fried potatoes and stir-fry to combine well with the sauce.
Garnish with chopped green onions and serve.
Notes
You can substitute the potatoes with fried cubes of paneer or tofu for a change.