Slow cooked Carnitas Tacos

1.5lb pork shoulder or pork butt
1 cup water
pinches of salt and pepper
1 small onion thinly sliced (i mince mine, as Joseph doesn't like onion but loves the taste)
1 can Rotel tomatoes with chilies, Mild version ( i run this through a blender)
1/4 cup chopped cilantro
1/2 of a lime, juiced (sometimes I use a whole lime, i really like lime)
salt to taste
small white onion minced

White or corn fajita size tortillas
lettuce
cheese
tomato

Place roast in crockpot, pour water in the crockpot, season roast with salt and pepper and add onion slices.
Cook on low for 6-10hrs.
When completely tender remove from crockpot.
Discard juices, de-fat, shred and place back in crockpot.
Stir in tomatoes, cilantro, white onion, salt to taste and lime juice.
Keep on warm until ready to serve.