Preheat oven to 425 degrees F. Line a baking sheet with foil, and set aside.
Use a pairing knife to cut the brussels sprouts in half. Then, separate the leaves as best you can. Toss the leaves, almonds, scallions, oil, salt and pepper in a large bowl. Spread them out into one even layer onto the prepared baking sheet. Roast for about 10 to 15 minutes or until crispy and slightly charred.
In the meantime, make the sauce. In a small pot, combine the balsamic vinegar, soy sauce, and honey. Cook over low heat until it has reduced by half and is syrupy. Pour over the brussels sprouts and toss to fully coat. Enjoy right away!