Sinigang na Sugpo

Ingredients
10 cups water
2 pieces onion quartered
4 pieces tomatoes, seeded and quartered
2 pieces daikon (peeled and sliced diagonally into discs)
12 pieces long beans (sitaw), cut into 2-inch lengths
4 pieces green chili peppers (sili)
35 ounces prawns or shrimps, trimmed
14 ounces spinach or Asian watercress (kangkong)
Directions
Bring water to a boil. Add onions and tomatoes. Simmer for 5 minutes. Add daikon, long beans, chili pepper, fish sauce, and Mama Sita's Sinigang mix. Continue to simmer for three minutes, uncovered. Add the shrimps and simmer for another 3 minutes. Turn off the heat and add the spinach or kangkong. Cover to steam-cook the vegetables. Serve with fish sauce.