Sinigang na Isda sa Mangga

8 to 10 cups water

1 large green mango, peeled and sliced thinly

2 native tomatoes, quartered

1 large onion, quartered

1 radish (labanos), peeled and sliced into rounds

1 bundle yard-long beans (sitaw), cut into 2-inch lengths

2 pieces okra, sliced diagonally in half

1 large boneless bangus (milkfish), scaled, gutted, and sliced into 3 to 4 pieces

patis (fish sauce), to taste

1 bundle kangkong (water spinach) leaves