Layers of Happiness

Remove the "silver skin" (Here is a video tutorial):
3 Lay the slab of ribs bone-side up so that they curve towards you. The silver skin is a pale white skin, like plastic stretched over the bone side of the ribs.
4 Slide a butter knife under the silver skin in between two bones in the middle of the rack.
5 Using a paper towel, gently pull the membrane off the ribs.
Prepare the ribs:
6 Cut the rack in half (or thirds if you have a small slow cooker).
7 In a small bowl, whisk together the mustard and apple cider vinegar.
8 Brush the ribs on all sides with the mustard mixture.
9 Liberally season the ribs on all sides with bbq seasoning.
10 Add the ribs to the slow cooker. Arrange in a single layer if you can.
11 Cook on high for 3-4 hours or low for 6-7 hours. The ribs are done when they reach 190 to 200 degrees.
12 Preheat the oven to broil.
13 Remove the ribs from the slow cooker and transfer to a baking sheet.
19 Season with a little more bbq seasoning. Generously brush bbq sauce on top of the ribs.
14 Broil for 3-4 minutes until the bbq sauce starts to bubble and caramelize.
15 Remove from the oven and top with a little more bbq sauce. Broil for another 2-3 minutes until the bbq sauce starts to bubble again.
16 Cut the rib rack into individual ribs. Serve with extra bbq sauce.