Cheese-stuffed Meatloaf

Description
Purchased from Patterson Estate in Tyler, Texas in 1992. Notation on card indicates this is Regina’s favorite meatloaf. Dated 1922. I have made this several times using different variations of Cheese. My favorite is asiago.
 * Contributed by Cat's Recipes Y-Group

Ingredients

 * 2 pounds ground beef
 * 1 cup of your favorite cheese
 * 2 eggs beaten
 * 1 small white onion chopped
 * 1 small green bell pepper chopped
 * 1 stalk celery chopped
 * ¼ cup plain bread crumbs
 * 1 tablespoon mustard
 * 3 tablespoons ketchup

Directions

 * 1) Mix ground beef, onion, bell pepper, celery, bread crumbs, mustard and ketchup together well.
 * 2) Press half of the mixture into bottom of iron skillet.
 * 3) Add cheese, leaving about on-half inch from edge.
 * 4) Add remaining meat mixture.
 * 5) Seal edges and bake at 350°F for 45 minutes.