Pearl Barley Casserole

Ingredients (9)

• + 3 tablespoons butter add to pantry
• + 1 large onion, chopped add to pantry
• + 2 ribs celery, chopped add to pantry
• + 1 cup pearl barley add to pantry
• + 1 (8 ounce) package sliced fresh mushrooms add to pantry
• + 1 green bell pepper, chopped add to pantry
• + 2 cups chicken broth add to pantry
• ✓ salt and ground black pepper to taste
• + salt and ground black pepper to taste add to pantry