In a medium bowl add the flour, cream of tartar, salt, and sugar and whisk to combine well. Add the yeast and whisk one more time. Add the yogurt, melted butter and water, and either with your hands or with a stand mixer fitted with the paddle attachment mix on medium speed for about 3 minutes. The dough should be a little bit sticky. If you are using a mixer you will need to pull away from the sides of the bowl in spots. Because It will not turn into a fully integrated ball of dough on its own.
Press the dough into a ball, cover it and place it in a warm spot to rise until it doubles in volume (for about 40 minutes)
Once the dough has finished rising, turn it out onto a lightly floured surface and sprinkle lightly with more flour. Roll it out (about ⅜ inch thick), top with your favorite toppings, transfer it on a baking tray and place it in the oven