Stir-Fried Chicken with Lemongrass Recipe

Ingredients

• 2 teaspoons cornstarch
• 2 tablespoons water
• 1 pound boneless, skinless chicken breast or thighs ( (cubed))
• 5 tablespoons vegetable or canola oil ((divided))
• 2 onions ( (halved and thinly sliced))
• 1 tablespoon finely minced garlic
• 2 small Thai or serrano chiles ((minced; see Note))
• 2 lemongrass stalks ((tender inner white part only; minced; about 1/4 cup))
• 1 cup less-sodium chicken or vegetable broth
• 3 scallions ((cut into 1-inch pieces; white and green parts))
• 1 tablespoon fish sauce
• 2 teaspoons sugar
• 1/2 cup fresh cilantro leaves
• Hot cooked rice ((to serve; optional))