Cheese Spinach Sausage Pie

1 pound sweet italian sausage, chopped
6 eggs
2 packages, 10 ounces, frozen, chopped spinach, thawed and well drained
1 package, 16 ounces, mozzarella cheese, shredded
2/3 cups ricotta cheese
1/2 teaspoons salt
1/8 teaspoons pepper
1/8 teaspoons garlic powder
Pastry for 9 inch 2 crust pie
1 tablespoon water

In 10 inch skillet, over medium heat, brown sausages about 10 minutes, stirring frequently. Spoon off fat. Reserve one egg yolk. In large bowl, combine remaining eggs with sausages, spinach, cheese and spices. Prepare pastry. In small bowl, combine reserved egg yolk with water, brush top of pie. Bake in 375 degree oven for 1 1/4 hours or until pie is golden. Let stand 10 minutes, then cut into wedges. Makes 10 servings. Frozen pie crust may be used. Excellent for buffet supper and can be served cold. Wrap in foil and store in refrigerator for up to 2 days.