
A make ahead casserole consisting of vegetables and a creamy sauce - served as a side or a main, this casserole will most certainly get vegetables onto your table and into the bellies of your loved ones. This dish can easily be reheated without losing any of the creaminess, cheesiness, or texture!
Preheat oven to 350 degrees.
In a large bowl, stir all ingredients together, saving half cup of the french fried onions for later. Once fully mixed together, transfer to a large casserole dish.
Bake for 50 minutes.
Remove from oven and top with fresh chopped parsley and the remaining french fried onions.
Serve immediately or allow to cool completely before packaging for freezing. See notes.