Preheat oven to 425º and line a large baking sheet with foil. In a large skillet over medium heat, heat oil. Add onion and cook until soft, 5 minutes, then add ground beef and cook until no longer pink, 6 minutes more. Drain fat.
Add garlic and taco seasoning and season with salt. Cook until meat is well browned and slightly crispy, 5 minutes more.
Add half the tortilla chips and top with beef mixture, and half the cheese. Repeat one more layer.
Bake until cheese is bubbly and melted, 15 minutes.
Remove the nachos from the oven and immediately top with pickled jalapenos, tomato, avocado, green onions, cilantro and remaining chopped kit toppings. Drizzle with remaining chopped kit dressing and enjoy!