Preheat oven to 350 degrees F, spray with non stick spray and line a 8x4 loaf pan with parchment paper, leaving the paper hanging out the sides. Set aside.
In a large bowl, whisk together your almond flour, baking powder, sugar, poppy seeds, and salt.
Add your lemon zest, lemon juice and butter and mix until combined.
Add your eggs and mix until all combined.
Pour the mixture into your lined 8x4 loaf tin.
Bake in the oven for 45-50 minutes. The loaf is cooked when golden brown and springs back when touched. Allow to cool for at least 30 minutes.
Glaze:
Add the powdered sugar, lemon juice, and vanilla to a small mixing bowl.
Slowly add your water by the tbs until the mixture has a pouring consistency.
Drizzle over the cooled loaf, cut into 12 equal slices and enjoy!