In the same pan, to the same leftover oil, add chopped garlic, ginger and slit green chillies. Saute for 30 seconds
Add spring onions both white and green parts and saute for 2-3 minutes.
Now add ½ cup sliced capsicum and saute on a high heat for 3-4 minutes.
Add red chilli powder, pepper powder, salt, soya sauce, vinegar, tomato chilli sauce and mix well. You can use only red chilli sauce also. But adding tomato chilli sauce adds depth of flavours to the sauce. I have used Hot and sour Maggi Tomato Sauce. Alternatively, you can also add mixture of tomato sauce and red chilli sauce.
Mix well everything and add ½ cup water. Bring it to rolling boiling. For more lighter sauce you can add up to ¾ cup of water.
Dissolve1 tablespoon of corn flour in 3 tablespoon of water and add into above sauce.
Keep on low flame and mix well everything till sauce starts to thicken.
Add ½ teaspoon of sugar and mix well everything. This is optional step, if adding tomato and chilli sauce adding sugar optional. But if you are using only red chilli sauce, then I highly recommend to add ½ to 1 teaspoon of sugar as per your taste.
Now add fried paneer and gently mix well everything. Cook on lower flame till it coats well and reaches the desired consistency.
Turn off the flame, add 2-3 tablespoon of spring onions.
Mix well and serve with fried rice or noodles.