Preheat your oven to 400°F (200°C). Lightly spray a standard loaf pan with cooking spray to prevent sticking.
In a large mixing bowl, combine the almond flour, baking soda, kosher salt, and granulated sweetener. Whisk them together until they're well blended.
Pour in the beaten eggs, Greek yogurt, vanilla extract, ¼ cup lemon juice, and the fresh lemon zest. Mix everything thoroughly until your batter is smooth and lump-free.
Pour the cake batter evenly into your prepared loaf pan. Place it in the preheated oven and bake for about 30 minutes, or until a toothpick inserted into the center comes out clean.
Once baked, remove the cake from the oven and let it cool in the pan for 10 minutes.
While the cake is cooling, combine the 2 tablespoons powdered sweetener, ¼ cup lemon juice, and a pinch of xanthan gum in a small saucepan. Heat over medium heat for a few minutes, stirring constantly until the sweetener is completely dissolved and the syrup is smooth.
Spoon this warm lemon simple syrup evenly over the top of the slightly cooled cake while it's still in the pan. This adds an extra burst of lemon flavor!
Once your cake has fully cooled (this is important for the glaze to set), gently remove it from the loaf pan. In a small mixing bowl, whisk together the ⅔ cup powdered sweetener and ¼ cup lemon juice until you have a smooth, creamy glaze.
Drizzle or spoon the lemon glaze generously over the top of your completely cooled lemon pound cake. Slice into 12 servings and get ready to enjoy this delightful, low-carb treat!