Remove green core from sorrel. Wash thoroughly.
Add washed sorrel calyces, bay leaves, cloves, cinnamon powder, star anise, white sugar and 4 cups of water to a large pot.
Place the pot on medium heat. Stir occasionally.
Leave to brew for 15 minutes.
Taste test. Adjust sugar and spices to your liking.
Turn off heat. Allow to steep for 15 minutes.
Strain to remove the sorrel and spices. Use the soft sorrel for jam or compote.
Measure the strained sorrel drink.
Add extra water to bring it to 4 cups of liquid (I needed 1/3 cup extra water).
Pour the liquid back into the pot.
Add the agar agar powder.
Whisk to incorporate fully.
Leave for 10 minutes for the agar agar to bloom.
Place the pot on medium heat.
Stir often for 3 to 5 minutes or until the mixture reaches 185-212°F (90-100°C).
Turn off the heat.
Pour into a baking dish (like an 8x8 inch glass dish).
Set aside to cool until firm (about 1 to 2 hours).
Place in the fridge to chill (about 2 hours).
Cut into 16 sorrel jelly bars.
Serve chilled. Consume within 3 to 5 days.