1/2 pkg. frozen spinach, thawed & squeeze dried
1 med. onion, chopped
1 c. Swiss cheese, diced fine or grated
1/4 c. mushrooms, sliced
1 1/2 c. milk
1 c. biscuit mix
3 eggs
1/2 tsp. salt

Place first 4 ingredients in quiche dish or large deep pie dish. Combine other ingredients in blender. Pour contents over ingredients in dish. Bake at 400 degrees for 35-40 minutes.