Rinse and Soak the Rice. In a large bowl, rinse the rice several times until the water runs completely clear.
Fill the bowl with fresh water, add a generous pinch of salt, and let the rice soak for about 20 minutes while you bring a pot of water to a boil.*Reserve 3 tablespoons of hot water for blooming the saffron. Parboil the Rice. Bring a large pot of generously salted water to a boil. Drain the rice and add it to the boiling water.
Cook uncovered on medium-high heat for 7–8 minutes, skimming off any foam that rises to the surface.
The rice should be tender on the outside but still firm in the center. Drain and rinse briefly under cold water to stop the cooking.
Prepare the Saffron. Crush the saffron threads using a mortar and pestle (if needed). Add to the reserved hot water and let bloom for a few minutes.
Create the Tahdig. Heat a 10–12 inch nonstick skillet over medium heat. Add olive oil, bloomed saffron water, and turmeric, swirling to evenly coat the bottom of the pan.
Spoon a thin, even layer of rice directly onto the saffron mixture, this will become the crispy tahdig layer.
Add the remaining rice on top, forming a gentle mound. Use the handle of a spoon or spatula to poke a few holes into the rice to allow steam to escape.
Steam and Cook. Wrap the skillet lid with a clean kitchen towel and cover the rice. Cook on medium to medium-high heat for about 30–35 minutes, or until you hear gentle crackling sounds.*If your stove runs hot, reduce the heat slightly. Flip and Serve. Remove the lid and place a serving plate over the skillet. Carefully invert to release the rice, revealing the golden, crispy tahdig on top.
Alternatively, spoon out the rice and break the tahdig into pieces to serve alongside.