Marinate the salmon for about an hour in a little oil, turmeric and salt. This step is not necessary and can be skipped if you don't have time to marinate.
Heat oil in a pan and add whole spices - cumin seeds, cardamom pods, a piece of cinnamon andcloves. Roast the spices for a couple of minutes.
Now add Salmon skin down first to hot oil. Sear both sides and remove from oil once both sides are seared.
Add sliced daikon radish and brown both sides.
Add 2 cups of water to the pan. Add the spice powders listed above - turmeric , kashmiri red chili powder, ginger powder, fennel powder and salt and give it a good stir.
Add back the salmon, cover the pan and let it simmer in sauce for 10 minutes on low heat.
In the end you can add some garam masala.