Separate the yolks from the whites and let sit for 30 minutes @ room temperature.
In a separate bowl, lightly hand whisk the egg yolks. Mix in 1 tbsp oil and the coriander purée .
Sift in the dry ingredients to the egg batter. Gently incorporate with the whisk until smooth with no lumps. Set aside and whip the meringue.
Place the egg whites in a clean bowl. (Note: it will be difficult to whip up the meringue if there's any trace of grease on the utensils) Add in 1/4 tsp cream of tartar and beat the egg whites on LOW until foamy. Gradually add the 50g sugar as you whisk. Once the sugar is added, switch to HIGH and whisk until stiff peaks. You get stiff peaks when the meringue firmly holds its shape on the whisk.
Gently whisk in 1/3 of the meringue into the coriander batter. Once it’s well mixed, switching to a spatula - gently incorporate this into the remaining meringue until it’s well combined.
Pour the batter into a 6 inch tube pan. Note: DO NOT grease the tube pan. The cake needs to cling to the pan to rise.
Once the batter is poured in, tap the pan firmly on the work table a couple of times to even out the batter and to release any large air bubbles. Just in case, I also like to use a wooden skewer to run through the batter a few times to get rid of bubbles.
Pop the pan into the oven and bake at the lowest rack @165C for 30 minutes. Then switch down the heat to 150C and bake for another 15 minutes or until a skewer comes out clean.
Once the cake is removed from the oven, carefully invert the pan and cool upside down. The tube pan has little feet for invertion. If it’s not high enough, use a bowl and set the inverted pan on top to let it cool completely. Do not remove the cake from the pan until it is completely cool. (note: It’s fine if the cake has some cracks on top as this becomes the bottom of the cake when it is removed from the pan.)
Once completely cooled, gently run a knife around the edge of the pan to release the cake. Do the same around the edge of the tube. Then invert the pan, gently coax the cake off the base of the pan and down the tube to completely remove. (Watch the recipe vid @ 3:55min. to see how it’s done)
Enjoy!