If you've ever been to Japan, you're likely aware of one of the country's most popular condiments—Kewpie mayo. And even if you haven't hopped on a flight to Tokyo lately, chances are you may be ...

Canned tuna + mayonnaise = tuna salad, a staple of sandwich shops all over the U.S. While a plain tuna sandwich may not be the most exciting of lunch options, the salad can be punched up with the ...