In a medium saucepan with a tight-fitting lid, combine the uncooked rice, water, lemon zest, lemon juice, butter, and salt. Stir gently to combine.
Place the saucepan over medium-high heat and bring the mixture to a boil.
Once boiling, reduce the heat to low, cover with the lid, and simmer for 20 minutes, without lifting the lid.
Remove the saucepan from the heat and let it sit, covered, for 10 minutes to allow the rice to steam and finish cooking.
Remove the lid and fluff the rice gently with a fork.
Stir in the chopped parsley and serve warm.