Corned Beef with cayenne

1 lb pasta , small shapes like fusilli, rigatoni, bow ties, etc 6 tablespoons butter , divided 1 cup onion , sliced thinly 2 cups celeriac , sliced and[...]

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[...]

1 tablespoon vegetable oil 1/2 onion , chopped 1/2 bell pepper , chopped 1 (12 ounce) can corned beef (Hormel or other brand) kosher salt & freshly ground[...]