Combine marinade ingredients (fish sauce, soy sauce, garlic, palm sugar, chili flakes) and mix well. Let sit for at least 10 minutes. You may also leave overnight in the fridge.
If using a less tender cut, add meat to pressure cooker to tenderize. Afterwards add to a hot skillet with oil and fry until crispy and caramelized. You may also add a serrano chilie if you like for extra heat. Squeeze some lime juice over the top and taste and adjust for seasoning.
Salad
Dice onions, tomatoes, cucumbers, basil, cilantro, green onion finely. Add salt, pepper, and lime juice. Taste and adjust for seasonings.
Assembly
Set your oven broiler to 500 F. On a baking sheet lined with aluminum foil or parchment paper, add one layer of tortilla chips.
Toss the meat and shredded cheese evenly. Place in oven for about 5-10 minutes or until cheese melts.
Once the cheese has melted, remove and add your salad. Squeeze some sriracha all over. Feel free to add extra condiments such as sour cream, beans, guacamole, and various salsas and hot sauces. Your nachos are ready to serve!