Peel and press the garlic. Peel and grate the ginger.
In a large bowl, whisk soy sauce, rice vinegar, sesame oil, and brown sugar together. Add black pepper, most of the crushed garlic, grated ginger, and hot water. Continue to mix vigorously.
Slice the beef into thin strips and put them in a food container.
Pour the marinade over the beef and stir well. Marinate the beef in the fridge for 4 to 24 hours.
Heat a large skillet on the stove over high heat. Pour both the beef and the marinade into it.
Leave the beef alone for about 2-3 minutes. After that, cook it for another 5 - 6 minutes, stirring regularly.
Add the sour cream, mayonnaise, lime juice, hot sauce, and the remaining garlic to another bowl. Mix well until creamy.
Mix shredded cabbage with finely chopped parsley to make a coleslaw. Season with lime juice and salt.
Heat the skillet over medium-high heat. Toast the tortillas on each side for about 1-2 minutes or until browned.Spread the sauce, beef bulgogi, and coleslaw on each tortilla. Top with more sauce and parsley. Serve immediately.