Step 1: Mix up a savory meatloaf. Use your favorite recipe, as long as it doesn't result in too crumbly or soft a loaf.Step 2: Bake meatloaf in a shallow pan. In a few steps, you'll see why it should be on the thin side. Give it a medium-firm press-down to make sure it will hold together when done.Step 3: Peel, boil and mash potatoes. I cheat with my handblender, which works well for meatloaf sushi because you want the mashed potatoes to be pretty smooth.Step 4: Form oblong potato beds. I usually make these about thumb-length.Step 5: Let finished meatloaf cool, and make gravy. Remove the cooked meatloaf from its pan, and while it cools, use a little bit of flour and water with the pan juices to make gravy.Step 6: Slice meatloaf slabs. Once the meatloaf is cool enough to handle, slice it into slabs. Cut each slab into thumb-length pieces.Step 7: Assemble meatloaf sushi. Place a slab of meatloaf upon each bed of mashed potato.Step 8: Blanch and slice scallions. Cut them in half longwise, then press them open with your finger. If they're quite wide I'll slice them lengthwise again.Step 9: Wrap each piece of sushi with scallion. The "wet" interior of the blanched scallion usually sticks pretty well to the potato. A little push into the bottom of each piece should do the trick.Step 10: Serve meatloaf sushi to delighted friends. Sometimes I put a dollop of gravy on each one; sometimes I serve it separately in a cute dish. Enjoy!