3 roast beef watercress rosemary mayonnaise Recipes

tri-tip roast, 1 1/2 inches thick (about 1 1/2 lb), sourdough bread, each about 1/2 -inch thick, unsalted butter, softened, watercress, whole-grain mustard, chopped fresh rosemary leaf, kosher salt, garlic cloves, minced, ground black pepper, whole-grain mustard, mayonnaise, extra virgin olive oil, red wine vinegar, kosher salt, ground black pepper

garlic clove, mayonnaise, anchovy paste, fresh lemon juice, chopped fresh rosemary, fresh finely chopped parsley, fresh coarse ground black pepper, flour tortillas or 4 small pita bread, only thinly sliced rare roast beef (from deli counter), watercress , course stems discarded