Spinach Souffle
["1 pkg. Stouffer's spinach souffle", "2 eggs", "3 Tbsp. milk", "2 tsp. chopped onion", "1/2 c. sliced, drained mushrooms", "3/4 c. grated Swiss cheese"]
["Mix together spinach souffle, eggs, milk, onion, mushrooms and Swiss cheese.", "Pour into unbaked 9-inch pie shell and bake at 400\u00b0 for 30 to 40 minutes.", "Serves 4 to 6."]
["Stouffer's spinach", "eggs", "milk", "onion", "mushrooms", "Swiss cheese"]