In a small saucepan, add lemongrass, lime (juiced and whole piece), ginger and boiling water.

Bring to a simmer and reduce heat to low. Let it cook for 5 mins.

Remove the pot from heat, add the green tea leaves and cover the pot. Let it sit for 3 mins.

Strain the mixture into a bowl, add honey and whisk well. Add ice and let it cool.

Transfer to a glass bottle. Store in the fridge for 3 to 5 days.