Destalk the thyme.
Zest the ruby grapefruit.
Melt the coconut oil.
Juice the half grapefruit.
Connect the whisk attachment to the hand blender.
Pre heat the oven to 170°C.
Grease and line a loaf tin.
Sift Ingredients 1 (flour, baking powder, bicarbonate of soda, salt) into a large bowl.
Set aside.
Add Ingredients 2 (sugar, yoghurt, thyme, eggs, zest, juice, vanilla, coconut oil) into a large jug.
Whisk until combined.
Add the wet ingredients to the dry ingredients.
Mix on a low speed until combined.
Pour the batter into a lined loaf tin.
Bake for 1 hour at 170°C or until a skewer tests clean.
Add Ingredients 3 (sugar, juice, thyme) into the medium bowl.
Mix until combined.
Poke holes in the still warm cake with a skewer.
Pour the sugar mixture on to the cake evenly.
Let cool in the tin.
Serve.
Decorate with rose petals and extra thyme.