How to Make It
In a large bowl, toss the brussels sprouts with the bell peppers and onion.
In each of 2 large skillets, heat 1/4 cup of the olive oil until shimmering. Add the vegetables, season with salt and pepper and cook over high heat, stirring, until browned in spots and crisp-tender, about 4 minutes. Transfer the vegetables to a large bowl and garnish with the parsley. Serve right away.