Heat oil in a stir fry pan and add the ginger juliennes. Fry them until they start turning to a golden brown color and then remove them onto a plate and set them aside for garnish at the end.
Now to the same oil, add cumin seeds, red chillies, and turmeric powder. cook them until cumin seeds sizzle.
Then add small diced onions, slit green chili, and a little salt with them to help onions cook faster. Saute them until onions start turning to golden brown color.
Next add ginger garlic paste, Kashmiri chilli powder, coriander powder, cumin powder, and black pepper powder. Mix well and cook for a minute making sure spices do not burn.
Now add chopped-up small tomato pieces and a little salt with them. Mix well and cook until the tomatoes are completely soft and oil is separating from the onion and tomato mixture.
Add tomato ketchup and mix well.
Now add the long strips of bell peppers, long strips of tomatoes, and cubed onion pieces and mix well. Add enough salt to the vegetables. Cook covered while stirring in between until the vegetables are cooked well but still have a crunch to them. Do not overcook them. Check the seasonings and add any required seasonings.
Now add the strips of paneer and mix gently making sure you don't break the paneer or vegetable pieces. Cook covered for 2 or 3 minutes until the paneer absorbs all the flavors and is properly heated through.
Now garnish with the fried ginger juliennes and cilantro and serve with any flatbread like roti, chapati, paratha, or naan.