Classic Broccoli, Rice and Cheddar Casserole

Ingredients (10)

• 4 cups cream of mushroom soup
• 2 heads broccoli
• 12 oz grated cheddar cheese
• 1/2 medium onion
• 2 cups cooked rice
• 1/2 cup scallions
• Pinch salt and pepper
• 1/4 cup grated Parmesan cheese
• 1 tbsp unsalted butter
• 1/2 cup panko bread crumbs