It seems to often be the case that the most comforting foods are the ones that lean in a retro or nostalgic direction, and these stuffed meatloaf slices definitely fit into that category. Theyre a unique way to go about a meatloaf dinner and they have a decidedly 1950s feel with a beefy, savory flavor thats accompanied by a creamy mashed potato filling. (but its not just mashed potatoes no way. Its so much more. ).