Combine the chicken mixture thoroughly and arrange the pieces evenly across the bottom. An even chicken layer provides a consistent foundation for the rice.
Distribute the drained rice over the chicken without stirring it through. The rice should form a separate upper layer.
Measure the water into another pot, using 3 cups for the pressure cooker or 3½ cups for the covered-pot method. The vessel choice determines the starting resistance liquid amount.
Dissolve the water’s salt, taste it, and bring it to a vigorous boil. The water should taste slightly salty before it reaches the rice.
Direct 2 cups of boiling water around the inside edges of the cooking vessel, then gently distribute the remaining water over the rice. A gentle pour helps preserve the separate layers.
Even out the rice surface as needed and scatter over the remaining mint, plus the optional fried onions and saffron milk if using. Keep these additions on top rather than stirring them into the chicken.
For the pot finish, cover and cook over medium heat until the rice is tender, checking around 15 minutes after the liquid begins boiling in the assembled pot. If the grains remain hard and the bottom is dry, add ¼ to ½ cup more boiling water as needed and continue covered cooking until the grains are fully cooked but separate.
For the pressure cooker finish instead, use medium-high heat, secure the lid and whistle, and move the cooker off the burner after 1 whistle. The whistle marks the point to stop heating the cooker.
Allow the cooker’s pressure to release naturally before opening, then gently loosen the finished rice with a fork. Handle the grains lightly so they retain their shape.
Lift portions through the full depth of the layers. Each portion should contain upper-layer rice and chicken from underneath.