After frying paneer, there's some oil+butter is left in the pan. If the quantity is too much for you, take some out, otherwise proceed.
Add 1 bay leaf, 1 tsp caraway seeds (shahi zeera), 1 green chilli, 10-12 black pepper corns, 1 black cardamom, 2 cloves and 1 tbsp ginger garlic paste.
Saute till ginger garlic paste turns slightly brown.
Add onion paste.
Then add 1/4 tsp turmeric powder, Kashmiri Red chilli powder to taste & 2 tsp coriander powder.
Mix and add 2 tbsp water if the masala is too dry.
Cook till onion paste starts leaving the sides of the pan and begins to separate oil.
Add 3/4 cup water.
When water begins to boil, add 1/2 cup onion barista/fried brown onion after crushing it, fried paneer, 1 tsp garam masala, salt to taste, 1 tsp sugar and 1/4 tsp kewra water. Mix.
Put a lid and let it simmer for 5 minutes on low heat so that paneer absorbs all the flavours.
Paneer Korma is ready. Enjoy