Cut the root ends off the enoki mushrooms, about 2 inches from the end. The mushrooms should still be attached at the bottom.
Carefully separate the enoki mushrooms into small bundles that are about ½-inch in diameter.
Lay a piece of beef on a cutting board and place a small bundle of mushrooms in the middle. Tightly wrap the thinly sliced meat around each bundle of mushrooms. Continue rolling up beef rolls until you run out of sliced meat.
Sprinkle the rolls on all sides with Umami Stir-Fry Powder or Diamond Crystal kosher salt.
Heat a large skillet over medium-high heat. When the pan is hot, pour in the avocado oil.
Place half of the rolls in the hot pan, seam-side down. Fry undisturbed for 1 minute or until browned on the bottom.
Flip the rolls and continue cooking for 1 to 2 minutes or until browned all over. Transfer the cooked rolls to a shallow dish and finish cooking the rest of the beef and enoki mushroom rolls
While you’re browning the beef and enoki rolls, make the sauce by whisking All-Purpose Stir-Fry Sauce and arrowroot powder.
When you finish frying the beef and enoki rolls, turn down the heat to medium-low and pour the sauce into the now-empty pan. Cook, stirring, until the sauce thickens slightly.
Turn off the heat and add the rolls to the pan. Coat them well with the sauce.
Transfer the beef rolls to a serving platter and garnish with scallions. Enjoy!