In a small pot bring 600ml of coconut to simmer (set 25ml of coconut milk aside), add the 2 teabags and vanilla extract. Let simmer for a few minutes before turning off the heat. Let the teabags infuse for about 15 minutes. Remove the teabags (or if you use loose leaf tea, strain it out)(skip this step if you're only making vanilla panna cotta)
Add the honey. At this point give it a taste. You may want to add a bit more honey if you like it sweeter. Let the coconut milk tea cool down (you can speed up the process by placing the pot in a bath of cold water or ice cubes).
Place the 25ml of coconut milk that's left in a small pan, add the 2g of agar agar. Bring it to a boil while stirring it constantly and let it simmer for 2 minutes (keep on stirring). Mix this into you pot of cooled down coconut milk tea, mix it well.
Now you can pour the milk tea mixture into your crust, make sure you only fill the crust enough so you still have space to add the layer of strawberry grapefruit jelly after. Place it in your fridge for about 1hr to cool and set. If you're in a hurry you could leave it in the freezer for 15min or so.