1 1/2 pounds fresh ground beef chuck (about 80% lean)
Kosher salt
2 teaspoons shichimi togarashi (see note)
1 cup thinly sliced scallions
1 recipe Teriyaki Sauce (I strongly advise homemade over any store-bought brand)
4 soft hamburger buns
4 tablespoons mayonnaise, preferably Japanese-style
2 cups finely shredded green cabbage