Preheat the oven to 170 degrees C w/ fan.
Prepare lemon zest & lemon juice.
Mix semolina flour & baking powder.
Combine butter, sugar & salt w/ a handheld electric mixer.
Add eggs & combine thoroughly.
Add lemon zest.
Add flour mix.
Finally add lemon juice.
Grease the baking tin & cut the baking parchment to cover bottom & long sides.
Pour the cake batter in the baking tin.
Bake it for 35 min in the preheated oven.
Make the usual test w/ a wooden pin... if the pin doesn’t come out clear - add another 5 min in the oven.
Let the cake rest for about 10 min.
Remove the cake from the baking tin & let it cool completely.
Melt the chocolate in a bain-marie.
Pour resp. spoon the chocolate over the cake & let it cool.