Creamy Boursin® Orzo with Chicken and Mushrooms
1 (5.2 ounce) package garlic and herb cheese … 1 cup diced onion 1 cup uncooked orzo pasta 1 tablespoon minced fresh parsley, or to tast… 1 teaspoon salt 1 ½ pounds boneless, skinless chicken breast,… 2 cloves garlic, minced 2 cups chicken broth, or more as needed 2 cups sliced fresh mushrooms 2 teaspoons seasoning salt 3 tablespoons butter, divided ½ teaspoon ground black pepper