2 (10 oz.) pkgs. frozen, chopped spinach
4 eggs, beaten
1 med. minced onion
1/2 c. grated Parmesan cheese
1/2 c. grated Mozzarella
1/2 tsp. salt
2 c. herb stuffing mix (Pepperidge Farm)
1 1/2 sticks butter, melted

Cook spinach according to package. Drain well and cool. Mix remaining ingredients. Put in 2 quart casserole dish. Chill at least 1 hour or up to 8 hours. Bake at 350 degrees for 20 minutes.