Step 1

In a 12-inch skillet over medium-high, melt 3 tablespoons of the butter. Add the onion and ½ teaspoon each salt and pepper, then cook, stirring, until it begins to soften, 3 to 5 minutes. Add the garlic and cook, stirring, until fragrant. 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 ½ teaspoon salt, then cook, stirring occasionally, for 5 minutes. Stir in the asparagus stalks and cook, stirring, for 3 minutes, then stir in the asparagus tips. Continue to cook, stirring, until almost all the liquid has been absorbed and the asparagus is tender, about another 2 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.