Preheat the oven to 350°F (175°C) and grease a 9-inch round cake pan.
In a large bowl, cream the softened butter and granulated sugar until light and fluffy.
Add the eggs, one at a time, beating well after each addition, then stir in the vanilla extract.
In a separate bowl, whisk together the flour, baking powder, and salt.
Gradually add the dry ingredients to the creamed mixture, alternating with the milk and beginning and ending with the flour mixture.
Fold in the crushed pineapple gently until just combined.
Pour the batter into the prepared cake pan and smooth the top with a spatula.
Bake for 30-35 minutes or until a toothpick inserted in the center comes out clean.
Let the cake cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
In a small bowl, mix together the powdered sugar and lemon juice to make the glaze.
Drizzle the lemon glaze over the cooled cake, allowing it to soak in slightly.