Ingredients
1 quart low-sodium chicken broth
2 skinless, boneless chicken breast halves (3/4 pounds), butterflied and separated into cutlets
Coarse salt and freshly ground pepper
5 tablespoons unsalted butter, divided
1 medium yellow squash (8 ounces), cut into 1/4-inch-thick rounds (about 2 cups)
1 medium yellow onion, finely chopped (1 1/2 cups)
1 1/4 cups Arborio rice
1/2 cup dry white wine
8 ounces thin asparagus, trimmed and cut into 2-inch pieces (1 1/2 cups)
2 ounces grated Parmigiano-Reggiano or Parmesan (packed 1/2 cup), plus more for serving
Preparation
Combine broth and 3 cups water in a saucepan; bring to a simmer over medium heat.
Meanwhile, season chicken with salt and pepper. Heat a large, straight-sided skillet over medium-high. Melt 1 tablespoon butter. Cook chicken, flipping once, until golden brown in places and just cooked through, 4 to 5 minutes. Transfer to a plate. Melt 1 tablespoon butter in skillet. Add squash in a single layer, season with salt and pepper. Cook, flipping once, until browned in places and tender, 3 to 4 minutes. Transfer to a plate. Melt 1 tablespoon butter in skillet. Add onions; season with salt and pepper. Cook, stirring occasionally, until translucent, 2 to 3 minutes. Add 1 tablespoon butter to skillet and melt, then add rice and cook, stirring a few times, until translucent and nutty, about 1 minute.
Add wine to skillet and boil, scrapping browned bits from bottom of pan, until mostly evaporated, about 1 minute. Ladle enough broth into skillet to just cover rice. Simmer until almost evaporated, stirring constantly, and adding more broth, one ladleful at a time, until rice is creamy but still very al dente, 18 to 20 minutes (you will still have some broth remaining in saucepan). Stir in asparagus and a ladleful of broth. Continue cooking and stirring constantly until rice is al dente and asparagus is crisp-tender, 4 to 5 minutes. Remove from heat.
Thinly slice chicken and return to skillet with accumulated juices, squash, and cheese, gently stirring to combine. Stir in more broth, a little at a time, until risotto is creamy and sauce evenly coats asparagus and chicken. Season with salt and pepper. Serve immediately topped with more cheese.
