Shrimp Risotto With Asparagus and Lemon

Bring broth and water to a simmer in a medium saucepan. Add asparagus and simmer, uncovered, until just tender, about 4 minutes. Transfer asparagus with a slotted spoon to an ice bath to stop cooking, then drain. Keep broth at a bare simmer, covered.

Cook onion in 2 tablespoons butter with ¼ teaspoon salt in a 4-quart heavy saucepan over medium heat, stirring occasionally, until softened, about 5 minutes.

Add rice and cook, stirring constantly, 1 minute. Add wine and simmer, stirring constantly, until absorbed.