• Chop onion, cut cheese into chunks, and beat egg in a small bowl. 
• In a large bowl combine ground beef, cheese, bread crumbs, onion, mustard, 2 tablespoons of ketchup, beaten egg, garlic, salt, and pepper. I use clean dry hands for this. 
  1 pound lean ground beef, ½ cup diced cheese, ⅓ cup breadcrumbs, ¼ cup onion, 2 teaspoons Dijon mustard, 2 tablespoons ketchup, 1 egg, 1 teaspoon garlic, ½ teaspoon salt, ½ teaspoon black pepper
• Divide meat mixture into fourths and shape into 4 loaves, they will look sort of like flat footballs, approximately 4" X 2".

Air Fryer

• Place into air fryer basket that has been sprayed with cooking spray. Air fry at 380° for 10-12 minutes.
  4 tablespoons ketchup
• Top each loaf with 1 tablespoon ketchup and air fry again at 380° for 2 minutes. Remove from air fryer basket with tongs and allow to rest a few minutes.

Oven

• Preheat oven to 425°
• Place loaves on a parchment paper or aluminum foil lined baking sheet, top with 1 tablespoon of ketchup.
  4 tablespoons ketchup
• Bake 25 minutes, let rest for a few minutes before serving.