The Collaborative International Dictionary of English v.0.48:

Haslet \Has"let\ (h[a^]s"l[e^]t), n. [F. h[^a]telettes broil,
   for hastelettes, fr. F. haste spit; cf. L. hasta spear, and
   also OHG. harst gridiron.]
   The edible viscera, as the heart, liver, etc., of a beast,
   esp. of a hog. [Written also harslet.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

haslet
    n 1: heart and liver and other edible viscera especially of
         hogs; usually chopped and formed into a loaf and braised

U.S. Gazetteer Places (2000):

Haslet, TX -- U.S. city in Texas
   Population (2000):    1134
   Housing Units (2000): 402
   Land area (2000):     7.499261 sq. miles (19.422997 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    7.499261 sq. miles (19.422997 sq. km)
   FIPS code:            32720
   Located within:       Texas (TX), FIPS 48
   Location:             32.959733 N, 97.340028 W
   ZIP Codes (1990):     76052
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Haslet, TX
    Haslet