1Place the mustard seed and chile peppers in a bowl, and mash together to create a fine paste.
2Heat the oil in a skillet over medium heat, and cook the onions until golden. Mix in mustard and chile paste, chili powder, turmeric, and salt. Stir in water. Place salmon in the skillet. Reduce heat to low, and cook until most of the liquid has evaporated and fish is easily flaked with a fork.