• Preheat oven to 275°. Cook pancetta, shallot and apples with the thyme sprig on medium-low heat until soft. Deglaze with cider vinegar and fish sauce. Add the apple brandy and flame, then add cider. Strain the liquid (you should have about 1 cup of liquid) and purée in a blender or processor with the eggs, egg yolk and salt. Add the chicken livers and purée until smooth. With the blender on medium-low slowly drizzle in the clarified butter to emulsify.
• Strain and pour into 2 widemouth pint jars. Screw on the lids. Place in a water bath and simmer until the internal temperature reaches 155° (about an hour). Chill in an ice bath before serving.
• Makes 2 pint jars, plenty for a cocktail party of 20 or more. Serve on crackers or baguette slices.