Prepare the topping by mixing about a ¼ cup of zaatar to about a ¼ cup of olive oil. The ratio of zaatar to olive oil depends on how strong you want the zaatar flavor to be in your mankoushe. The main thing however, is to make sure that the zaatar has a spreadable consistency. If you have too much oil in there, you'll end up with a very oily mankoushe. Vice versa, if you have too little oil, you'll end up with a dry mankoushe. Just make sure to balance that ratio to reach your desired consistency.
Preheat the oven to 450 F before you begin preparing the dough as this dough uses baking powder for leavening. Baking powder reacts quickly with the dough, but it also loses its effect quickly. So, you'll want to make sure that your oven is hot and ready to bake your manakeesh as soon as they are ready.
Once the pizza dough is ready, take about a tennis ball size dough and roll it into a circle of about 1/4 inch thickness and 8 to 9 inches in diameter. You'll want to do this on a silicone mat as the dough will stick to the surface that you are rolling it onto. Make sure to generously oil the rolling pin to prevent the dough from sticking to it.
Place the silicone mat with the dough on it onto a baking sheet, and place it into the oven on the bottom rack.
The baking time for the dough will vary depending on the diameter and the thickness of the dough. So you'll want to keep an eye on it as it bakes. Generally, the dough bakes in about 5 to 7 minutes. The one thing that you do not want to happen is for the dough to brown. You'll want to take the dough out of the oven before this begins to happen. A brown dough means a hard and crusty mankoushe.
Take about a tablespoon or so of the zaatar mixture and spread it onto the prebaked dough. You need to be able to cover the entire dough with a light covering of the zaatar topping. If you put too much, the mankoushe will have a very strong taste, and would not be pleasant. The amount of zaatar topping that you put of course depends on you. If you like more zaatar, put more. If you like less zaatar, put less.
Once you have placed the toppings on the mankoushe, place it back in the oven and bake for 2 more minutes.
Allow the manakeesh to cool slightly before delving into them. The traditional way of eating manakeesh is to fold them in half which would create a crescent shape with the toppings encased in the middle.
You could serve manakeesh with all sorts of vegetables such as tomatoes, cucumbers, radishes, olives, onions, and so on.