Fish with Mustasa (Isda na may Mustasa)

Mustasa is a green leafy vegetable that's abundant in the Philippines and often pickled (buro, fermented, soaked in salt or brine). You may consider it as a watercress type veggie, but I guess in English its called Mustard leaves.

2 cups fish fillet (any fish of choice, less bony more meaty)
1 cup Mustasa leaves, cut into three
½ cup water
3 tbsps cooking oil
2 tbsp tausi (black seeds or fermented black beans)
¼ cup green onions
2 tbsp cooking oil

Heat pan and sauté the fish then add the mustasa leaves. Followed by the onions and tausi. Add the water. Cover the pan, continue to cook the dish in low heat. When vegetables are tender, place in serving platter. Enjoy!