Preheat your oven to 350°F (175°C). Grease and line a loaf pan with parchment paper.
In a medium bowl, whisk together the flour, baking soda, baking powder, and salt. If using, fold in the poppy seeds for added texture and flavor.
In a large mixing bowl, beat the granulated sugar and Greek yogurt together until smooth. Add the eggs one at a time, mixing well after each addition. Then stir in the vegetable oil, lemon zest, and fresh lemon juice until evenly combined.
Gradually add the dry ingredients to the wet mixture and mix until just combined. Be careful not to overmix; a few lumps are fine.
Pour the batter into the prepared loaf pan, smoothing the top. Bake in the preheated oven for about 50-60 minutes, or until a toothpick inserted into the center comes out clean.
Once baked, remove the loaf from the oven and allow it to cool in the pan for about 10 minutes before transferring it to a wire rack to cool completely.
Notes
Dust the cooled lemon loaf with powdered sugar for an elegant finish. Serve with fresh berries or a dollop of extra Greek yogurt on the side for added flavor.