To make a vegetable casserole, preheat the oven to 350 degrees
In a large bowl, mix both bags of vegetables with cream of mushroom soup, sour cream, black pepper, salt, garlic powder, and 4 oz. of crispy fried onions.
Pour the mixture into a greased 9x13 baking dish.
Top it with Parmesan cheese and the remaining crispy fried onions.
Bake for 40 minutes or until it's hot, bubbly, and golden brown.
Serve right away.