A hearty and earthy casserole. Served with steamed vegetables or enjoy with our Yogurt Baked Chicken. Mushroom Casserole Go to recipes By Stonyfield Vegetarian American Main DishesA hearty and earthy casserole. Served with steamed vegetables or enjoy with our Yogurt Baked Chicken. Ready In: 45 minutes Level: Easy Prep: 15 minutes Cook: 30 minutes Yields: 8 Servings Print RecipeIngredients3 1/2 lb mushrooms1/2 stick butter (divided)1 package of stuffing mix (about 14oz)1 c water1/2 c chopped onion1/2 c chopped celery (about 2 stalks)1/4 c shredded Parmesan2 c shredded cheddar cheese1 1/4 c Stonyfield Organic Greek plain Whole Milk yogurtdirectionsStep 1Preheat oven to 350°.Step 2Wash, sliced and cook mushrooms in skillet until tender, drain and set mushrooms aside.Step 3In the same skillet melt 1/4 stick of butter and add water, then combine with stuffing mix, celery and onion.Step 4In a separate bowl, combine cheddar cheese and yogurt.Step 5In a greased 13x9 inch casserole dish, layer mushrooms, yogurt mixture, then stuffing.Step 6Repeat, ending with stuffing.Step 7Cut remaining 1/4 stick of butter into small pads and scattered on top.Step 8Before cooking, sprinkle with 1/4 cup of parmesan.Step 9Bake for 30 minutes.