With more than 35 fresh ingredients from five Asian cultures, you can explore Pei Wei Asian Diner’s flavorful menu on a budget with this promo. To embark on your tasty trek, the popular diner is offering a buy-one-get-one-FREE entrée coupon — just enter your e-mail address here. (You should receive the coupon via e-mail within 24 hours.) The coupon is valid for one FREE entrée with the purchase of another entrée (of equal or greater value) at participating locations, excluding airports. Eligible entrées include Lettuce Wraps, Salads, Original Wok Fresh Entrees and Small Wok Fresh Entrees. The offer ends Thursday, February 13, which is also the same day the coupon expires. Limit one coupon per person/e-mail address. For a locations nationwide, click here.