This is a classic home cooked dish, especially for bento boxes, as well as an Izakaya dish. It is also a very common item you will find in American Japanese restaurants. Since I had thinly sliced frozen beef for sukiyaki (#2 in the second picture) and it would not improve with time, I decided the time had come to thaw it.
Rolling thinly sliced meat, either beef or pork, around a core of vegetables or any cylindrical edible object (even a hotdog) is a very common Japanese technique.
It so happened that we were short of any vegetables except scallion so I made this scallion roll. The amounts are for three rolls perfect for two small servings (Picture above).
Scallion: I removed the outer layer, the root ends and green part of about a dozen scallions (#1).
Beef: This was thinly sliced beef for sukiyaki (frozen). I used 2-3 slices per roll depending on the integrity and size of the beef slice and 3-4 scallions in the center and made three rolls (#3).
With the seam side down, I seared the meat using a non-stick frying pan on medium flame with a small amount of oil (I used light olive oil) (#4). I seared all four sides and then added the seasoning.
Seasoning: This could be any store bought teriyaki-style sauce. I did not want to make it sweet so I used an equal amount of sake (2 tbs) and concentrated noodle sauce or “mentusyu” from the bottle (2 tbs). You could use mirin instead of sake to make it more classic teriyaki flavor (i.e. sweet). (#5).
I put a tightly fitting lid on the pan and steam/braised it for few minutes (#5). When the sauce was reduced, I remove the lid and moved the pan back and forth to roll the beef scallion rolls in the sauce to completely coat them(#6).
I sliced one roll into 4 pieces and served (the first picture). This is a rather mundane dish but my wife really liked it. If available, I would have used “Tokyo scallion” or “Naganegi” 長葱 but multiples of regular scallions is just fine and probably much more tender.