Slice onion and capsicum.

Make a mixture of cornflour, salt and pepper mix it. And coat paneer cubes in it. Deep fry it till it become golden.

Now heat 1 tsp oil. And saute onion and capsicum in it. Add salt and tomato ketchup. And take it off the flame And mix it. Now add this mixture in fried panner. Toss it. Add some more pepper and chilli flakes and serve it hot while paneer is still crispy.