Preheat your oven to 350°F (175°C) and grease a 9-inch round cake pan.
In a mixing bowl, cream together the softened butter and sugar until fluffy.
Beat in the eggs, one at a time, mixing well after each addition.
Stir in the vanilla extract and crushed pineapple.
In a separate bowl, combine the flour, baking powder, baking soda, and salt.
Gradually add the dry ingredients to the wet mixture, mixing until just combined.
Pour the batter into the prepared cake pan.
Bake for 30-35 minutes, or until a toothpick inserted in the center comes out clean.
Allow the cake to cool in the pan for 10 minutes before transferring to a wire rack.
Once cooled, decorate with fresh pineapple slices before serving.