Dice the meat and season with salt, black pepper, and garlic powder. Set aside to allow the flavors to develop while you work on the pico de gallo and creamy guacamole.
Chop tomato, onion, garlic, and cilantro and add to a small bowl. Add sliced serrano pepper. Season with salt and a squeeze of lime juice. Set aside until needed.
Mash avocado in a bowl. Add lime juice, sour cream, salt, and garlic. Mix until creamy, then set aside.
Preheat oven to the temperature specified on the fries bag. If you plan on frying the frozen fries or using fresh potatoes, you can skip this step.
Line a cookie sheet with foil and lightly spray with non-stick cooking spray. Add frozen fries and sprinkle with Tajin seasoning. Bake according to instructions on the bag.
Meanwhile, heat one teaspoon of oil in a cast-iron skillet. When the pan is very hot, add the seasoned meat and cook until charred. Set aside.
When the fries are ready, add to an oven-safe serving dish. Top with shredded cheese and pop back into the oven for a few minutes until the cheese melts. If the meat has cooled off add it on top of the cheese before popping the fries back into the oven.
Top the hot fries with Pico de Gallo, cotija cheese, sour cream, guacamole, and jalapeno slices.
Drizzle with your favorite hot sauce and serve while sizzling hot!