Preheat your oven to 200°C (390°F) and grease a loaf pan or cake tin with olive oil. Line with baking paper if necessary.
Mix the dry ingredients in a bowl: flour, baking powder and a pinch of salt.
Add the eggs one at a time, mixing well. Pour in the milk and olive oil, stirring constantly.
Add tuna, crumbled feta, chopped green olives, finely chopped parsley and a little black pepper to the dough. Mix until the dough is evenly distributed.
Pour the batter into the prepared pan, spreading it out evenly. Place the pan in the preheated oven and bake for about 40-45 minutes, or until the cake is golden brown on top and the tip of a knife in the center comes out clean.
