Boil 4 cups of water and add sago pearls. Simmer for 20 minutes. Drain water and place sago in a colander under running cold water for 30 seconds. Pour sago in pot and add 4 cups of water again. Boil, then reduce heat and simmer sago for 1 hour. Turn off heat and leave cooked sago on stove top for 5 hours or until translucent. Set aside.
Soak green gulaman (agar again 1 cup water for ½ an hour. Put on stove and bring to a boil. Reduce heat and simmer until dissolved. Transfer to a container to set. Do the same with red gulaman. Then cut into small cubes.
In a pot, add brown sugar and water. Simmer until sugar is fully dissolved. Turn off heat and let it cool.
In a pitcher, add 5 to 6 cups cold water, brown sugar syrup, vanilla, gulaman, sago pearls and ice. Stir.
This sago gulaman recipe makes 3 to 4 servings using tall glasses. Enjoy!
You can use other flavor aside from vanilla.
While dissolving gulaman, you can flavor it with sugar and vanilla. I don't since this is already a sweet beverage.