This elegant dish gets unique flavor from a prized spice, saffron, used two ways: added to the water used to boil the potatoes and stirred into a creamy yogurt sauce. The bright sauce is delicious spooned over rich salmon, potatoes, and carrots—which get another flavor-packed lift from a glaze of honey and fragrant cumin. Aleppo pepper adds just a hint of spice throughout the dish, balanced by cooling fresh mint.