On a large rimmed baking sheet, toss together Brussels sprouts, oil, salt, black pepper, and red pepper.
Bake until Brussels sprouts are barely tender, about 8 minutes. Add shallot and garlic to pan, stirring to coat. Bake until shallots and garlic are just soft, about 6 minutes more.
Drizzle honey over vegetables, stirring to coat. Bake until honey is thin and bubbly, 2 to 3 minutes more. Pour vinegar over vegetables, stirring with wooden spoon to combine and loosen any bits on bottom of pan. Bake until sauce has thickened and slightly reduced, about 2 to 3 minutes more.
Stir mixture and transfer to serving dish. Garnish with parsley, if desired.
Recipe by Southern Lady Magazine at https://southernladymagazine.com/honey-glazed-brussels-sprouts-recipe/