In a large 6 quart slow cooker add sliced onions and top with pork butt.
Pour in ginger beer.
In a small bowl whisk together ketchup, apple cider vinegar, Worcestershire sauce, kosher salt, smoked paprika, pepper, cumin, chipotle chili powder, chili powder, garlic powder, and Dijon mustard.
Pour homemade sauce over pork butt, cover, and slow cook on high for 6-8 hours.
Flip the pork butt halfway through cooking.
When the pork is tender remove it from the slow cooker and shred with two forks.
Add pulled pork back to the slow cooker and stir to combine.
Keep warm while you prepare the tacos.
For slaw:
In a large bowl add all ingredients and mix together until creamy.
Cover and let sit in the refrigerator until you’re ready to make your tacos.
Taste before servings and season with salt if needed.
For tacos:
Set a small skillet over medium-high heat and toast corn tortillas. Each side should take about 30 seconds.
To assemble tacos layout corn tortilla, fill with pulled pork, top with slaw, and sprinkle with cilantro and a squeeze of lime.