Make-Ahead Fresh Green Bean Casserole

How to Freeze a Green Bean Casserole Made from Scratch with Fresh Green Beans & Fresh Mushrooms First there was the World’s Best Green Bean Casserole , the viral recipe on A Veggie Venture, my food blog about vegetables. Now? Let's call this new recipe the World’s Most "Convenient" Green Bean Casserole. Both recipes are made from scratch and call for fresh green beans and fresh mushrooms. But with Make-Ahead Green Bean Casserole? You make the entire casserole in advance and then freeze it for serving later! See what I mean? Convenient! America’s Favorite Thanksgiving Casserole, Made In Advance & Frozen. Vegetarian. Travels Well.