Pork Tenderloin in Pan Sauce with brownies

1 1/4 lbs pork tenderloin 1/4 teaspoon salt 1/4 teaspoon fresh ground pepper 1 tablespoon dijon-style mustard 1 tablespoon butter or 1 tablespoon margarine[...]

1/2 cup Dijon mustard 3 tablespoons chopped fresh tarragon 1/2 teaspoon fresh ground black pepper 2 (1 lb) pork tenderloin, trimmed 1 tablespoon olive oil 1[...]

12 -16 large sage leaves , thoroughly washed and dried, stems left olive oil , for frying kosher salt 1 Making the fried sage leaves, if using:. 2 Pour enough[...]