First of all we will prepare the sauce.
Take a blender and add chopped onions, chopped tomatoes, chopped green onions, cumin, chopped green coriander, lemon juice, chicken stock, 4 tablespoon vinegar, Worchester sauce and salt in it and then blend them all together.
Add the blend prepared in step 1 in a separate pan, and then cook it until it starts boiling. Cool it for some time and your sauce is ready.
Now next step is to prepare steak.
Take a bowl and add one teaspoon of ginger and garlic paste in it along with, crushed black pepper, soya sauce, vinegar and salt. Mix all of these and once they are mixed well, marinate the steak in it.
After marinating leave the steak for 10 minutes.
Now preheat the oven grill and then place the steak on grill pan. Once the steak gets tendered, place it in a serving plate and pour the sauce over it and then serve.