Step 1

In a 12-inch skillet over medium-high, melt 3 tablespoons of the butter. Add the onion, 1/2 teaspoon salt and ½ teaspoon pepper, then cook, stirring, until it begins to soften, 3 to 5 minutes. Add the garlic and cook, stirring, until fragrant, 1 to 2 minutes. Add the couscous and cook, stirring often, until it begins to brown.

Step 2

Pour in the wine and cook, stirring, until the pan is almost dry, about 1 minute. Add 3 cups water and 1/2 teaspoon salt, then cook, stirring occasionally, until almost all the liquid has been absorbed, 9 to 10 minutes.

Step 3

Off heat, add the Parmesan, parsley and remaining 1 tablespoon butter, then stir until the butter melts. Taste and season with salt and pepper. Serve sprinkled with additional Parmesan and parsley.