Using a small mixing bowl, add in the soya sauce, 1 tablespoon of fish sauce, and black pepper to taste then mix together to combine. This makes the marinade. Place the beef in the bowl containing the marinade then mix to coat. Cover the bowl and let the beef marinate for about thirty minutes,
In the meantime, chop or slice your vegetables then set aside. place a skillet pan over medium heat, add in the sunflower seeds and toast for a few minutes until it becomes brown in colour. Do the same for the pork rinds then place both the seeds and pork rinds in a mortar and grind to fine powder, set aside.
Preheat the grill to medium-high heat, grease the grates then add in the marinated beef. Grill the beef for a few minutes until it is cooked through then place on a plate. Use a sharp knife to cut the steak into smaller pieces, then add to a large salad bowl.
Next, add in the shallots, tomato, spring onions, chili flakes, lime juice, the rest of the fish sauce, sweetener, mint leaves, coriander, crushed pork rinds, and sunflower seeds then mix properly to combine. Serve.