Bison has a rep for being tougher than beef, but I get great results by seasoning the meat generously and making sure I don’t overcook it. The bison is the perfect foil for six—count ’em—kinds of healthy alliums.
Serves 4
In a medium bowl, toss the bison slices, chili powder, garlic, ½ teaspoon of the salt, and the red pepper flakes.
In a very large (at least 12-inch) skillet, heat 1 tablespoon of the oil over medium-high heat. Add the bison in a single layer and cook, turning once, until browned and just cooked through, 1 to 2 minutes per side. Remove the meat to a bowl and reserve.
Add the remaining 2 tablespoons oil to the skillet, then add the sweet onion, leek, red onion, shallot, and scallions and cook, stirring occasionally, until the onions are browned and softened, 7 to 8 minutes. Add the bok choy stems and cook, stirring, until crisp-tender, 1 to 2 minutes.
Add the reserved bison and the remaining ½ teaspoon salt and cook, stirring, until warmed through, 1 to 2 minutes. Remove from the heat and stir in the bok choy greens and bell pepper. Serve immediately.