In a saucepan, combine the coconut milk, condensed milk, and water.
1 can 14oz regular coconut milk, 1 can 11oz condensed milk sugar, ½ cup water
Bring to a simmer and add the agar-agar. Stir very well until the agar dissolves. Then lower the heat, stir well more for an additional 5-10 minutes. Be sure not to burn the mixture by keeping the heat low.
1 bar agar-agar
Add the ube and stir in well. (In the States the ube is bought already cooked. If you have fresh ube, cook it before adding to the mix.)
1 cup grated ube
Stir in the vanilla extract.
½ tsp vanilla extract
Use the immersion hand blender to blend the ube into the mixture for a smooth texture. If you do not have a hand blender, you can strain the mix through a wire strainer.
Pour the mixture into a jelly mold or serving dish and refrigerate until set.
Once set, cut the ube jelly into desired shapes.