Preheat oven to 175°C. Grease your loaf pan and line with parchment—leave overhang so you can actually get the cake out without disaster.
Whisk flour, baking powder, salt, and turmeric in a bowl. Watch that beautiful golden color develop!
Here's where the original recipe gets it wrong. You need BOTH lemons to get 2 tablespoons of zest—don't try to be a hero with one lemon. Zest them into a large bowl, then juice one lemon for 2 tablespoons of juice.
Add 200g sugar to the zest and rub it together with your fingers until it smells like sunshine and looks like sunset. This is where the magic happens—you're releasing all those citrus oils.
Whisk the Greek yogurt, eggs, and lemon juice into that fragrant sugar mixture until smooth.
Add the flour mixture and fold gently—don't overmix or you'll end up with a tough cake. Fold in the melted butter last.
Pour into your pan, smooth the top, sprinkle with remaining sugar. Bake at 175°C 50-60 minutes until golden and pulling slightly from the sides.