Chop the guava in chunks and boil them in a cup of water for 5 to 7 minutes till it is soft. Set aside to cool. Once cooled blend it in a blender and sieve it through to get a smooth guava puree.
add the sugar in 1/4 cup of water and boil for 3-4 minutes to form a sugar syrup. set aside to cool.
slit the chilli into half and boil it in 1/4 cup water for 3-4 minutes. set aside for the chilli flavour to seep into the water.
In a tall jug add the guava puree, sugar syrup, chilli water and rest of the listed ingredients. Stir. Add ice cubes and chilled water and stir again.
Taste and adjust the sugar and spices if needed. Serve it chilled.
Serving tip - Dip the edge of the glasses in lemon juice and then line it with red chilli by dipping them in a bowl of red chilli powder.
