Grill the Beef: Begin by preheating your grill or pan over medium-high heat. Season the beef steak with salt and pepper, then grill for about 4-5 minutes on each side or until it reaches your desired doneness. Once cooked, let it rest for a few minutes before slicing it thinly.
Prepare the Salad: In a large bowl, combine the mixed salad greens, sliced cucumber, halved cherry tomatoes, thinly sliced red onion, chopped cilantro, and mint. Toss them gently to combine.
Make the Dressing: In a small bowl, whisk together the lime juice, fish sauce, soy sauce, sugar, and chili flakes if using. Taste and adjust seasoning as needed.
Combine Everything: Drizzle the dressing over the salad and toss gently to coat all the ingredients. Top with the grilled beef slices.
Serve: Serve immediately for a fresh and vibrant meal that’s sure to impress!