Spread 1 tbsp of butter evenly over one side of two slices of bread.
STEP 2
Place one bread slice onto the hot skillet, butter side down. Top with the mustard then a slice of cheese, then meatloaf. Spread the ketchup on top of the meatloaf.
STEP 3
Top with the remaining bread slice, butter side up. Cook for 3-4 minutes, or until the cheese melts. Flip sandwich carefully and cook for 3 minutes.
Cut in half and serve immediately!
STEP 4
For best results, cut a thick slice of meatloaf for this sammy. A minimum of 1-inch-thick meatloaf slices is ideal for optimal meaty flavor.