To prepare a vietnamese shaking beef sandwich with fire roasted jalapeo, watercress and crispy fried onion strings, you'll need: 1 pound ground beef 2 tbsp. sriracha sauce 1 cup water 2 tablespoons chile flakes 1 teaspoon kosher salt Instructions Preheat the oven to 450 ?F (232?C) and cook the beef until it's no longer pink in the center and the juices run clear. Remove it from the heat and allow it to rest for 5 minutes. Cut it into thin slices. Toss the slices with the remaining ingredients and season with salt and pepper.