Scrub potatoes well and drain. Lay Kosher salt in an even layer of a baking pan to accommodate all the potatoes in one batch without crowding. Bake in a preheated 375 degrees for 20 to 30 minutes until just tender. Remove and let cool. This step should be done 1 hour or as many as 4 hours before serving. While potatoes are baking, check through scallops and remove any remaining tough membranes. When potatoes are cool enough to handle, cut, with a sharp paring knife, the top 1/4 off and hollow out the potato to form a "boat". Reserve potato interiors and tops. Combine scooped out portion with the chopped portion of chervil. 1/2 of truffle oil and butter, season with salt and pepper to taste and refill potato "boats" and reheat in preheated 325 degree oven for 6 minutes. Next, heat 2, 10-inch, skillets until quite hot, as potatoes are reheating. Season scallops and pat dry with paper towels. Distribute canola oil evenly in both pans and put 1/2 scallops in 1 pan. 1/2 in the other taking care to put the "cut" side down and not to overcrowd them. Sear well until browned (approximately 2 to 3 minutes each side.) Remove scallops from pan and drain on paper towels briefly before arranging attractively on 4 warm plates with the now hot twice baking potatoes. Drizzle remaining truffle oil over scallops and potatoes and shave truffle over all garnishing with chervil sprigs.