How to Make It
Light a grill. In a blender, combine the 2 tablespoons of vegetable oil with the lime juice, fish sauce, soy sauce, garlic, chile, ginger and sugar and puree. Season the dressing with salt and pepper.
Brush the steak with vegetable oil and season with salt and pepper. Grill over high heat until the meat is charred outside and medium-rare within, about 5 minutes per side. Transfer to a work surface and let it rest for 5 minutes.
Meanwhile, in a bowl, toss the romaine with the cherry tomatoes, cucumber, onion, scallions, basil and cilantro leaves. Pour two-thirds of the dressing over the salad and toss. Divide among 4 plates. Slice the steak 1/3 inch thick across the grain and serve alongside the salad. Pass the remaining dressing at the table.