Pre-heat the oven to 210°C
Line a baking tray with baking paper
Cook the garlic in the oil over a medium heat until soft
Add the onions and herbs and cook uncovered over a medium high heat for about 20 – 30 minutes, stirring occasionally until the onions are golden brown
Season with black pepper and set aside
Sift the flour into a large bowl
Rub in the butter until the mixture resembles fine breadcrumbs and stir in the cheese
Add the milk slowly and use a fork to bring it all together to make a soft dough that does not stick to the bowl
Roll out into a rectangle on a floured surface and carefully roll the dough onto the rolling pin and unroll onto the lined baking tray
Use your hands to shape the dough to cover the baking tray and cut off any parts of dough hanging over the edge
Spoon the fried onions on top of the dough
Drain the anchovies and arrange in a diamond shaped pattern over the onion filling
Stud each diamond with a halved olive
Bake for 20-25 minutes until the tart is golden brown and the dough is cooked though.
Cut into squares and serve immediately