• Preheat oven to 160 °C (320°F) with the fan on (see note 1 if you don't have a fan function) and grease the sides of an 8 inch cake tin (I use my homemade cake release). There's no need to grease or line the bottom.

Topping

• Begin by placing a saucepan over a medium heat and add in the butter and soft brown sugar. Keep gently stirring until all the butter is completely melted. Leave the mixture to heat up, and once it starts to gently bubble in the middle, leave it for another 10 seconds or so, give it a mix and then take it off the heat. We only want the mixture to caramelise a little and we don't want it to get too thick.
• Immediately pour the mixture onto the bottom of the cake tin, and move the cake tin around in a circular motion to evenly distribute the caramelised sugar. Set aside.
• Slice the two lemons in half and save one half for later as we'll need lemon juice and zest later on in the recipe. Slice the remaining 3 halves into thin slices. Try not to make the lemon slices too thick otherwise this can leave a bitter taste in your cake. Choose one round slice to go in the center of the cake, and then cut the remaining round slices in half (see video for demonstration).
• Place the round lemon piece in the center of the cake tin on top of your caramelised sugar (the sugar should be a bit firmer now), and then place the remaining half slices around the outer edges and slightly over lap them. If you have any left over lemon slices, just pop them aside to use for something else :). Set your cake tin aside for now.

Cake

• In a bowl sift together your flour, cornstarch, baking powder, baking soda, salt, cinnamon powder, ginger powder, ground cloves and ground nutmeg. Mix together with a whisk or fork and then set aside for now.
• In a medium sized bowl add in the butter, white sugar, oil and lemon zest (from the half lemon we saved earlier), and using a hand or stand mixer, mix on a medium speed for 2 minutes until light and fluffy.
• Next add in your egg, and mix until well combined.
• Next add in the lemon juice (also from the half lemon we set aside earlier) and Greek yoghurt. Mix until well combined. Scrape the batter off your attachments as we're going to mix the rest by hand.
• Add in your pre-sifted dry ingredients from earlier and using a spatula, gently fold until just combined and there are no streaks of flour running through the batter. Do not overmix.
• Pour the batter into the cake tin on top of the lemons and caramelised sugar. Tap the cake tin lightly on the counter to remove any large air bubbles and then bake for 35 minutes, or until a toothpick comes out with a few moist crumbs.
• Allow the cake to cool in the cake tin for about 15-20 minutes before turning it out onto your serving plate/cake stand. Allow it to cool for another 30 minutes or so before serving. Best served slightly warm with some Greek yoghurt on the side or whipped cream. Enjoy!