Preheat your oven to 350°F (175°C) and grease a standard loaf pan with butter or nonstick spray, or line it with parchment paper.

In a medium bowl, whisk together the flour, baking powder, and salt until well combined.

In a larger bowl, cream the softened butter and sugar together until light and fluffy, about 3 minutes.

Beat in the eggs one at a time, then stir in the lemon zest and lemon juice.

Gradually add the dry mixture to the wet mixture and stir until just combined. Be careful not to overmix.

Pour the batter into the prepared loaf pan and bake for 50 to 60 minutes, or until a toothpick inserted in the center comes out clean.

While the cake cools slightly on a wire rack, whisk the powdered sugar and lemon juice until smooth. Drizzle the glaze generously over the warm loaf.

Slice and serve with extra lemon slices on the side if you like.