In a large bowl, combine flour, baking powder, salt, and spices.
Add water, and olive oil.
Mix with a fork first and your hands then, to form a soft dough. It needs to have a firm consistency, but add more water if too dry, a few drops at a time.
Cover with plastic wrap and refrigerate for 1 hour. This is necessary for the dough to relax so it can be stretched.
Preheat the oven to 425ºF (220ºC).
Line baking sheets with parchment paper.
Turn out the dough onto a clean surface or countertop, lightly dusted with flour.
Cut pieces of dough, about the size of a whole walnut.
Roll each piece until as thin as possible without tearing. You need to work with several pieces at a time, stretching them as much as you can and letting them rest. Then go back to the first one and stretch it a little bit more.
Place the dough rounds on the sheets, brush them with olive oil, and sprinkle them with sea salt flakes and sesame seeds. Press lightly into the dough so they stay put during baking.
Bake for about 6 or 7 minutes, until blistered, lightly golden, and dry.
Remove from the baking sheet and let cool on a wire rack.
Keep in a tin or airtight container.