Let's get started by preheating your oven to 350°F (175°C). Grab a 9x5-inch pan, line the bottom with parchment paper, and give it a light spritz with cooking spray so your bread doesn't stick!
In a medium bowl, whisk together the flour, baking powder, baking soda, poppy seeds, and a pinch of salt. In a larger bowl, beat together the sugar, your choice of oil or melted butter, yogurt, eggs, lemon zest, and vanilla extract. This will create a rich, smooth mixture.
Now, gently fold in the dry ingredients from the medium bowl. Be careful not to overmix—just until everything is combined.
Pour the batter into your prepared pan and pop it in the oven. Bake for about 55 minutes to an hour, or until a toothpick inserted into the center comes out clean.
Once it's done, take the bread out of the oven and let it cool in the pan for about 10 minutes. After that, transfer it to a wire rack to cool completely and get that perfect texture.