Our Favorite Mushroom Rice

Bahan-bahan (8 porsi)

• 2 cups long grain rice (uncooked)
• 4 ½ cups chicken broth (divided)
• 1 large onion (chopped)
• 3 ribs celery (chopped)
• 12 ounces mushrooms (sliced ¼-inch thick)
• 1 stick butter (½ cup)
• 2 tablespoons chopped fresh parsley
• 1 ½ teaspoons poultry seasoning
• ½ teaspoon salt (or to taste)
• ½ teaspoon black pepper (or to taste)