Take oil in a wok and add ginger, garlic, onion, green chillies and coriander stems.
Saute till ginger garlic turn slightly brown.
Add turmeric powder, red chilli powder, black pepper powder, cumin powder and garam masala.
Saute for couple of seconds.
Cook it till the raw aroma of tomato is gone.
Add soya sauce and white vinegar. Mix.
Now time for adding vegetables. You can use any vegetables of your choice. We added carrot juliennes, green bell pepper, red bell pepper, cabbage, yellow bell pepper, green beans, broccoli florets, spinach, spring onion greens and mushrooms.
Saute on high heat for 2 minutes. Veggies should be well roasted but shouldn't loose their crunch.
Then add vegetable stock and salt. Mix well.
Let a boil come.
Top with fresh coriander leaves.