Pork Tenderloin with Celery Roots

Description
Purchased from the Weir Estate in Canton, Texas in 1990. Date on card says 1909
 * Contributed by Cat's Recipes Y-Group

Ingredients

 * 2½ pounds pork tenderloin, cut into 4 pieces
 * 5 celery roots, peeled and sliced
 * 1 white onion, peeled and sliced
 * 3 tablespoons butter

Seasoning mixture

 * equal parts of salt, pepper, parsley, thyme and basil

Directions

 * 1) Season the tenderloin.
 * 2) Put it in a small roasting pan with the butter.
 * 3) Roast in moderate oven for about 20 minutes.
 * 4) While the pork is cooking, boil the celery roots in salted water for about 15 minutes.
 * 5) Drain off water.
 * 6) Place celery and onion around the pork and finish cooking together, about 5 minutes then serve.