In a mixing bowl, combine warm water, minced garlic, ginger, sesame oil, brown sugar, rice vinegar, soy sauce, and black pepper. Whisk these ingredients together until the sugar dissolves. The aroma will mesmerize you!

Place thinly sliced beef in a resealable plastic bag or shallow dish. Pour the marinade over the beef, ensuring all pieces are well coated. Seal the bag or cover the dish with plastic wrap. Marinate for at least 30 minutes, or overnight for maximum flavor.

Heat a grill or skillet over medium-high heat. When hot, add the marinated beef in a single layer. Cook for about 2-3 minutes per side until nicely seared and cooked to your desired doneness. Transfer to a cutting board and let it rest for a few minutes before slicing into bite-sized pieces.

While the beef rests, warm your tortillas on the grill or in a skillet for about 30 seconds per side, or until slightly toasted. This adds an inviting warmth that enhances the tacos.

Begin with a warmed tortilla as the base. Add a generous amount of cooked beef, then layer with shredded cabbage, julienned cucumbers, and sliced avocado. Top it all off with fresh cilantro.

In a bowl, combine sour cream, garlic powder, lime juice, honey, Sriracha, and mayonnaise. Mix until smooth. Adjust seasoning based on your taste preference. Drizzle this delightful sauce over your assembled tacos.