Roast Beef & Watercress Tea Sandwich OCTOBER 9, 2012   With this tea sandwich, I added a little decorative touch by topping the bottom portion with chopped watercress. To give a tiny bit of tang, I used Japanese mayo.  TEA SANDWICH: ROAST BEEF & WATERCRESS  INGREDIENTS Very Thin Whole Wheat Bread (I used Pepperidge Farm.) Roast Beef, Sliced Thin Watercress Horseradish (I used Gold's Prepared Horseradish.) Mayo (I used Kewpie Japanese Mayonnaise.) Salt Pepper  DIRECTIONS 1. Mix mayo…
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