1 3.5lbwhole pork loin - can also use bone-in pork butt 5-6 lbs.
3tablespoonsfreshly ground coffee grounds
1/4cupstone ground mustard
1/4cupBuffalo SauceI used Frank's Red Hot Buffalo Sauce
Place the pork loin in the slow cooker. Peel the onion and place the remaining ingredients in a bowl and mix thoroughly. Pour everything over the pork loin into the slow cooker. Put the lid on tightly. Cook for eight hours on high.
While this is cooking prepare a coleslaw salad and toast the burger buns. This is a big sloppy sandwich and you'll want the buns toasted so they hold up well to all of the ingredients.
When the cooking is complete, remove the pork from the cooker. Place it in a large bowl to cool and shred.
Reserve the cooking liquid. Pour it thru a sieve, you should have about 3 cups of liquid. Add this to a heavy bottom sauce pan and add 1 1/2 cups of water and one 8 oz. can of tomato sauce. Bring the mixture to a boil and boil until it's reduced by half. Keep an eye on it as you don't want it to boil over or scorch - this will take about 20 minutes. The sauce will thicken just a bit - it is tangy and delicious!
When the sauce is done, assemble the sandwiches - top with pork, sauce and a big dollop of coleslaw.