Spinach Parmesan

Source: Comfy Country Creations

8 - 10 oz packages frozen chopped spinach - thawed 
1 medium onion - diced 
1/2 cup butter or margarine 
6 eggs - lightly beaten 
1 1/2 cups dry bread crumbs 
1 1/3 cups grated Parmesan cheese (reserve 1/3 cup) 
1 Tablespoon Worcestershire sauce 
1 teaspoon salt 
1/4 teaspoon pepper

Drain spinach, reserving 1 cup of liquid. Saute onion in butter until tender but not browned. In a bowl combine all ingredients except reserved Parmesan cheese. Spread mixture in two 9" x 13" baking dishes. Sprinkle with reserved cheese and bake uncovered at 350 degrees for 25 to 30 minutes or until set. Makes approximately 40 servings.