Prep the ingredients per the instructions above.
Slice the pork tenderloin into thin strips.
In a bowl, combine the soy sauce, water, garlic, ginger, brown sugar, and fish sauce. Mix well.
Add the pork tenderloin slices to the bowl and marinate for at least 30 minutes.
In a separate bowl, combine the thinly sliced carrots, cucumber, white vinegar, raw cane sugar, and kosher salt. Toss to coat the vegetables evenly. Set aside.
Heat a pan over medium-high heat and add a little oil. Cook the marinated pork tenderloin slices until cooked through and slightly caramelized. Remove from heat and set aside.
Brew and prepare the coffee to your liking.
Warm the tortilla in a medium heat skillet on both sides.
Heat butter in a nonstick pan on medium heat. Crack the eggs into the pan and cook until the white is firm. Season with salt and pepper to taste.
To assemble the banh mi tacos, place a few slices of cooked pork on each tortilla. Top with the pickled carrot and cucumber mixture.
Add a fried egg on top of each taco.
Garnish with fresh cilantro, thinly sliced jalapeño, sriracha (if desired), and scallions.
Serve the banh mi tacos with watermelon and coffee.