Combine first 5 ingredients in a small, heavy saucepan; cook over low heat, stirring constantly with a wire whisk, 8 to 10 minutes or until thickened (mixture will appear curdled until it thickens)
In a medium sauce pot, place the chicken meat and cover with water. Bring to a simmer and poach the chicken until cooked, approximately 3-5 minutes. Reserve and chill.
Generously salt and pepper the pork butt on all sides. Heat a 5-quart Dutch oven over medium high heat until hot. Add the oil, and then put the roast in the pot. Leave undisturbed for a few minutes or until the meat is uniformly browned on that side