Step 1: Preheat oven to 400° F.  Line a 12 x 17-inch sheet pan with aluminum foil and spray with cooking spray.

Step 2: Place potatoes on the bottom half of the pan. Drizzle with olive oil and sprinkle with salt and pepper. Toss to combine.

Step 3: In a medium skillet over medium heat, saute garlic and onion for 2 minutes. Place into a large bowl.

Step 4: Combine onion mixture, breadcrumbs, ketchup, ground beef, egg, horseradish (optional), Dijon mustard, oregano, parsley, salt, and pepper and mix well.

Step 5: If cooking for 4, shape mixture into 8 loaves, or adjust accordingly depending on the number of people you are cooking for. 

Step 6: Place a couple of cubes of cheese into each meatloaf and wrap tightly making sure none of the cheese is exposed.

Step 7: Place the mini meatloaves onto the upper half of the sheet pan and top each meatloaf with 1/2 teaspoon of ketchup. 

Step 8: In a medium bowl, toss the green beans with olive oil, salt, and pepper, then place them in between the meatloaves and potatoes.

Step 9: Place the sheet pan in the oven and Bake for 20-25 minutes, or until the internal temperature of the meatloaves reaches 161° F.