Preheat the oven to 325 degrees F and line a 9x5 loaf pan with parchment paper, leaving the edges hanging over the sides for easy removal.
In a large bowl, whisk together the flour, almond flour, sugar, baking powder, baking soda, salt, and lemon zest.
Whisk in the yogurt, oil, lemon juice, eggs, and vanilla, until fully combined.
Lastly, fold in the poppy seeds.
Pour the batter into the prepared loaf pan.
Bake for about 1 hour - 1 hour 15 minutes or until a tooth pick inserted comes out with moist crumbs.
Allow the loaf to cool in the pan for a few minutes, then transfer to a wire rack to cool completely.