3 open beef sandwiches greens horseradish Recipes

drained prepared horseradish, light sour cream, creme fraiche, vertically sliced onion (about 2 large), kosher salt, divided, flank steak, trimmed, freshly ground black pepper, trimmed arugula, extra-virgin olive oil, balsamic vinegar, texas toast, lightly toasted

plain fat-free yogurt or 2 tsp nonfat sour cream, reduced-fat mayonnaise, prepared horseradish, multigrain bread, toasted, mixed spring baby greens, lean roast beef, thinly sliced, crumbled blue cheese (optional)