Asparagus and Mushroom Au Gratin - so easy and tastes great! Asparagus and mushrooms topped with an easy cheese sauce made with butter, flour, milk, sherry, and mozzarella cheese. Ready to eat in 30 minutes! Great for a quick weeknight side dish and fancy enough for a dinner party! Everyone LOVES this recipe! #asparagus #mushrooms #casserole #mozzarella #sidedish
Preheat oven to 350ºF. Spray a 9x13x2-inch baking dish with cooking spray.
Trim any tough ends from asparagus and cut spears into 1-inch pieces. Place in prepared baking dish.
In a skillet over medium heat, melt 1 Tbsp butter. Add mushrooms and saute for about 5 minutes. Spread over asparagus in baking dish.
In a medium saucepan, melt 1/4 cup of butter. Stir in flour until smooth. Gradually whisk in milk and sherry. Cook over medium heat just until the sauce thickens, about 3 minutes. Remove from heat and stir in mozzarella cheese, salt and pepper. Pour sauce evenly over asparagus and mushrooms.
Bake uncovered for 30 minutes.
Can use any cheese you prefer - swiss, greyere, or gouda are good.Can assemble casserole and refrigerate overnight.Can substitute garlic salt for salt in recipe.