Rinse rice in a bowl or fine mesh strainer under cold water until water runs clear, 1 minute.
Heat oil in a medium pot over medium heat. Add onion and cook until soft and translucent, 5 minutes. Season with kosher salt. Add rinsed rice and cook until slightly toasted, 3 minutes.
Add vegetable broth, lemon juice, lemon zest, turmeric, and kosher salt. Bring to a boil, then reduce heat to low and cover. Cook for 15 minutes, then remove from heat and let sit, covered, for 5-10 minutes. Fluff with a fork.
Serve with fresh dill and roasted cashews, if desired.
Video
Notes
Storage: The cooked rice will keep well for up to 3 days in an airtight container. For best results, reheat in the microwave.