One-Pot Curry Chicken and Rice

Ingredients

• 2 tablespoons butter, divided
• 1 medium onion, halved and thinly sliced
• 2 tablespoons all-purpose flour
• 3 teaspoons curry powder
• 1/2 teaspoon salt
• 1/2 teaspoon pepper
• 1 pound boneless skinless chicken breasts, cut into 1-inch pieces
• 1 can (14-1/2 ounces) reduced-sodium chicken broth
• 1 cup uncooked instant rice
• Chopped fresh cilantro leaves, optional