Wash potatoes well, and slice into approximately ½" slices (I used a mandoline slicer).
Remove the smaller end pieces (I tossed them in an ovenproof dish and roasted them with some olive oil and salt to eat as-is) then place the larger slices in a bowl, and toss with the oils, salt and pepper.
Arrange the potato slices on a cookie sheet and place in the center of the oven.
After about 15 minutes, turn the potato slices over and continue to cook another 10 to 15 minutes or until they just start to brown.
While the potatoes are cooking, slice the truffle cheese. Then tear the Prosciutto di San Daniele into long strips.
Place slices of cheese on top of each potato slice. Put the tray back into the oven for a minute or two, just to melt the cheese.
Remove from the tray and place on serving platter, and allow to cool for a few minutes (or else the arugula will wilt). Add a leaf of arugula, and top with a piece of prosciutto.
Notes
Feel free to change the cheese to one you may have on hand, or simply prefer. Make sure it melts well.
I bought my truffle cheese at Trader Joe's, but if you cannot find any, substitute a cheese like Asiago or Fontina
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