Place the water in a medium bowl and sprinkle with the yeast. Let it stand until nice and foamy, about 5 minutes. When the yeast is bubbling, stir in the flour, oil, and coarse salt. Stir until the dough forms a ball. Turn the dough out onto a lightly floured surface and knead with floured hands until the dough is nice and smooth (about 5 min). If its to sticky add 1 tbsp at a time of flour or if its too stiff add 1 tbsp water at a time till soft and smooth.
You can also do this step in a mixer with your dough hook. Place the water in a measuring cup or bowl and sprinkle with the yeast. Let it stand until nice and foamy, about 5 minutes. Add the flour and salt to the mixer and then stir. When the yeast mixture is bubbling, add the yeast mixture and olive oil to the flour mixture. Mix on medium for 5 - 8 mins until its well combined and the dough looks nice and silky smooth. If its to sticky add 1 tbsp at a time of flour or if its too stiff add 1 tbsp water at a time till soft and smooth.
Transfer to a lightly oiled bowl and cover with a tea towel. Let the dough stand in a warm, dry place until it doubles in volume. This will take about 1 hour.
Heat a large flat cast iron griddle to medium high heat on your stove. Divide the dough into 4 equal pieces and cover with a tea towel. Roll out 1 piece to roughly 8 x 15 inches on a lightly floured surface. When the griddle is nice and hot, cook the flatbread dough for 2 - 3 mins each side. Repeat for all 4 flatbreads.
You can also do this in the oven. Heat your oven to 400 degrees. Place the flatbread dough on a parchment lined baking sheet. Repeat with the remaining dough. Bake until golden. This will take about 12-15 minutes. Pull them out of the oven and let them cool before topping them.
Store unused dough, wrapped in plastic wrap, in the fridge (for a couple days) or freezer (for a couple months). You can also store the unused cooked flatbread in the fridge or freezer for the same durations.