In a large bowl, stir together the beef, Worcestershire sauce, 1½ teaspoons salt and 1 teaspoon pepper. Set aside. On a 6-quart Instant Pot, select Normal/Medium Sauté. Add the butter and melt, then add the onions and garlic and cook, stirring occasionally, until the onions are browned, 8 to 10 minutes. Add half of the chilies and cook, stirring, until fragrant, about 1 minute. Pour in the brandy and cook, scraping up any browned bits. Add the bay and beef with its marinade; stir to combine, then distribute in an even layer.