Irish meatloaf

3/8 (10 ounce) package drained spinach
8 (10 ounce) package drained spinach 1 teaspoon butter
1/3 cup sliced mushrooms
2 tablespoons and 2 teaspoons chopped onion
2 tablespoons and 2 teaspoons fine dry bread crumbs
5 ounces ground beef
2-1/2 ounces lean ground pork
1/3 cup shredded Cheddar cheese
3 tablespoons dry bread crumbs
3/8 egg
3/4 teaspoon Worcestershire sauce
1/4 teaspoon salt
1/8 teaspoon freshly ground pepper
1 tablespoon chopped celery
3/8 egg
1 tablespoon and 1 teaspoon parsley
1/8 teaspoon salt
3/8 pinch ground black pepper
3/8 pinch ground nutmeg
Preheat oven to 350 degrees F (175 degrees C). Make the filling: Coarsely chop the spinach, and place in a large bowl; set aside. Heat butter in a large heavy skillet over medium heat. Saute mushrooms and onion until onion is translucent. Transfer mushroom mixture to bowl with spinach. Mix in 1/2 cup bread crumbs, 1 egg and parsley. Season with salt, pepper and nutmeg.

STEP2:
In a large bowl, combine ground beef, ground pork, Cheddar cheese, 1/2 cup bread crumbs, celery,1 egg. Season with Worcestershire sauce, salt and pepper. Place meat mixture between two sheets of waxed paper, and roll into a rectangle approximately 18×8 inches. Remove top sheet. Spread spinach mixture evenly over meat, leaving a 1/2 inch border. Roll up meat from the short end in jelly-roll style, lifting and removing paper as you go.