In a small bowl, whisk the vinegar, shallots, and 1 1/2 tablespoons canola oil together into a vinaigrette.
In a medium bowl, toss to combine the arugula and 2 tablespoons vinaigrette.
Heat remaining 1 tablespoon of canola oil in large non-stick skillet over medium heat. Dip scallops in seasoned instant flour. Add to skillet and cook 3 minutes; turn over and cook until almost opaque in center, about 2 minutes or longer.
Place 3 scallops around border of each plate. Using half of haricots verts for each plate, place 3 small bundles of haricots verts between scallops. Mound half of arugula mixture in center of each plate. Drizzle remaining vinaigrette over haricots verts and scallops. Drizzle 2 teaspoons truffle oil on each salad. Sprinkle salads with chives.