3 roast beef salad creamy horseradish dressing Recipes

mayonnaise, sour cream, drained bottled horseradish, red- or white-wine vinegar, fresh-ground black pepper, salt, head escarole (about 1 1/2 lb), torn into bite-size pieces (about 4 quarts), mushrooms, sliced thin, red onion, sliced thin, sliced roast beef , cut into approximately 1 1/2-by-1/2-inch strips

broccoli, white-wine vinegar, drained bottled horseradish, dijon mustard, salt, fresh-ground black pepper, olive or other oil, sour cream, thick-sliced (1/8 inch) roast beef , cut crosswise into 1/2-inch strips, halved cherry tomatoes, scallions including green tops, cut diagonally into thin slices