Method
Scrub and quarter the potatoes
Slice the cabbage thinly with a knife (halve the cabbage and lay the halves flat to thinly slice) or a mandoline (USE GLOVES!)
Heat oven to 375°
Pat the tenderloin dry with a paper towel and lay in the bottom of a heavy glass Pyrex dish. Scatter potatoes around the pork
Top with cabbage
Pour bottle of Greek dressing over the dish
Cook at 375° for an hour until the temperature of the pork registers 160° and you can easily pierce the potatoes with the tip of a knife.