Tahchin Tahdig (ته چین ته دیگ) — Persian Saffron Yogurt Rice Crust

• 400 gBasmati rice (rinsed until water runs mostly clear, then soaked)
• 18 gFine sea salt (divided; includes salting the boiling water)
• 2500 mlWater (for parboiling; plus more for soaking if needed)
• 300 gPlain full-fat yogurt (thick; strained yogurt works best for a firm crust)
• 2 largeEggs (about 100 g without shells)
• 0.3 gSaffron threads (finely crushed)
• 45 mlHot water (just off the boil, for blooming saffron)
• 1 gGround black pepper (about 1/2 tsp)
• 75 mlVegetable oil (neutral oil such as sunflower or canola)
• 30 gUnsalted butter (optional, for richer aroma and browning)
• 6 cubeIce cubes (about 60 g total; helps release the crust at the end)

Instructions

1. 1

   Rinse the rice in several changes of cold water until it runs mostly clear. Cover with plenty of cold water and soak 45 minutes at room temperature; this helps the grains elongate and cook evenly. Meanwhile, crush saffron threads to a powder, then bloom with 45 ml hot water; cover and set aside 10 minutes.

2. 2

   Bring 2.5 liters water to a rolling boil in a large pot. Add 15 g of the salt (reserve 3 g for the batter). Drain the soaked rice and add to boiling water. Boil 6–8 minutes, stirring once or twice, until the grains are tender on the outside but still firm in the center.

3. 3

   Drain the rice in a colander and rinse quickly with 250–500 ml cool water to stop cooking and remove excess surface starch. Let drain 5 minutes so the batter will cling rather than turn watery. In a bowl, whisk yogurt, eggs, reserved 3 g salt, black pepper, and all bloomed saffron until completely smooth.

4. 4

   Add about 1/3 of the drained rice to the saffron-yogurt mixture and fold gently until every grain is coated; this portion forms the crust. Keep the remaining rice plain for a lighter interior, or fold in another 1–2 tablespoons of the saffron liquid if you want the entire tahchin uniformly golden.

5. 5

   Set a 24 cm (9.5 in) nonstick or well-seasoned heavy pot over medium heat for 2 minutes. Add vegetable oil and (if using) butter; swirl to coat the base and lower sides. When the fat shimmers, spread the saffron-coated rice evenly across the bottom, pressing firmly with a spatula to compact.

6. 6

   Mound the remaining rice on top without packing it too tightly, then use the handle of a spoon to poke 5–6 steam holes down to the bottom. Wrap the lid in a clean kitchen towel and cover. Cook 10 minutes over medium heat, then reduce to low and steam 55–60 minutes until fragrant and deeply set.

7. 7

   To ensure a crisp, golden crust, keep the heat low but steady; you should hear a gentle sizzle, not aggressive frying. After 55 minutes, lift the lid briefly: the rice should look dry and steaming. If your stove runs cool, extend steaming 10 minutes; if it runs hot, reduce heat further.

8. 8

   Turn off the heat and rest, covered, 10 minutes to let the crust firm. For easy release, place the pot on a cold, damp towel for 30 seconds, then drop the ice cubes into the towel-wrapped lid area (not into the rice) and cover 2 minutes to create a quick temperature shock.

9. 9

   Run a thin silicone spatula around the edges. Place a large plate over the pot and invert in one confident motion. Lift the pot slowly; the tahchin should unmold as a single golden cake with a crisp base. Slice into wedges and serve immediately to enjoy the contrast of crunchy crust and tender rice.