Place pork roast in a large slow cooker and season generously with salt and pepper. Add soy sauce, vinegar, brown sugar, one jalapeno, red onion, garlic, and ginger to slow cooker. Cook on low heat for 8-10 hours until pork falls apart easily. Use a fork or tongs to shred the pork.
Once the pork is cooked and ready, make the vinegar slaw. In a large bowl, whisk together water, vinegar, sugar, and salt. Add in prepared veggies: carrots, cabbage, jalapeno, and cilantro. Combine well and let sit for 15-30 minutes.
Warm corn tortillas in a hot, dry skillet or over a gas burner. Fill each tortilla with pulled pork and top with vinegar slaw.
Recipe by at https://www.adventuregathereat.com/slow-cooker-bahn-mi-street-tacos/