Creamy Celery Casserole | Lazy Cooking

Ingredients

• ***For the breadcrumb topping:***
• 4 tablespoons panko breadcrumbs
• 1 tablespoons butter, melted
• ***For the casserole:***
• 3 tablespoons butter
• 1/3 cup onion, finely diced
• 4 cups celery, cut into 1/2-inch-thick slices
• 1 cup mushrooms, sliced
• 1/4 teaspoon poultry seasoning or 1/8 teaspoon dried ground sage
• 1 (8-ounce) can sliced water chestnuts
• 1 (10.5-ounce) can condensed cream of celery soup