Add the butter and olive oil to a small pot over medium heat. Once the butter has melted and is bubbly, add the chopped lemon to the pot. Cook, stirring continuously for one minute.

Add the water to the pot and increase to high heat. Once the water is boiling, remove the pot from the heat and add the couscous. Stir to cover all the couscous in water then let it rest for 5 minutes.

Then, fluff the couscous with a fork.

Stir in the lemon zest and chopped parsley. Serve immediately.