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 Dishes Greek A hearty and earthy casserole. Served with steamed vegetables or enjoy with our Yogurt Baked Chicken. Ready In: 45 mins Level: Easy Prep: 15 mins Cook: 30 mins Yields: 8 Servings Print Recipe Ingredients 3 1/2 lb mushrooms 1/2 stick butter (divided) 1 package of stuffing mix (about 14oz) 1 c water 1/2 c chopped onion 1/2 c chopped celery (about 2 stalks) 1/4 c shredded Parmesan 2 c shredded cheddar cheese 1 1/4 c Stonyfield Organic Whole Milk Plain Greek Yogurt directions Step 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.