Preheat the oven to 350 degrees F. Line the bottom of a 9x5’’ pan with parchment paper, and grease with cooking spray.
In a medium bowl, whisk together flour, baking powder, baking soda, poppy seeds, and salt. In a large bowl, beat together sugar, oil or melted butter, yogurt, eggs, lemon zest and vanilla.
Slowly fold the dry ingredients, just until incorporated.
Pour the batter into the pan and bake for 55 minutes - 1 hour or until a toothpick inserted in the center comes out clean.
Remove from oven and allow to cool in the pan for 10 minutes. Transfer to a wire rack to cool completely.
