In a large pot, combine the ground pork butt, diced onions, black pepper, hot sauce, and pepper flakes.
Add in the apple cider vinegar and water, and bring the mixture to a boil.
Reduce the heat to medium-low and let the mixture simmer for 2-3 hours, stirring occasionally.
Remove the mixture from the heat and let it cool for a bit.
Use an immersion blender to blend the mixture until it's smooth.
Transfer the mixture to a crockpot and let it cook on low heat for another 3-4 hours.
Give the mixture a taste and adjust the seasoning as necessary.
Notes
Serve over rice with a side of mustard-based barbecue sauce.
You can make this dish ahead of time and store it in the fridge or freezer. Simply reheat on the stovetop or in the microwave when you're ready to eat.
Don't be afraid to experiment with different types of meat, vegetables, and spices to create your own signature barbecue hash recipe.