Corned Beef with Cabbage - With fruit

4 lbs corned beef brisket , Flat cut with seasoning packet 2 onions , peeled and cut into eights 15 ounces Guinness stout 2 cups water 1 Remove excess fat[...]

1 egg yolk 1/2 teaspoon dry mustard 1 pinch cayenne pepper 1 tablespoon water 1/2 cup butter , melted and warm (1 stick) 2 tablespoons lemon juice kosher salt[...]

2 tablespoons butter 1 medium yellow onion , coarsely chopped 1 tablespoon sofrito sauce 1/2 cup tomato sauce 1 (9 ounce) package frozen French-cut green[...]