Cover a baking sheet with aluminum foil and spread the chips across in a single layer. Set aside. Preheat the Blackstone to low heat. A good place to start is around the third heat level from the bottom. You can adjust after a few minutes if you feel like your nachos could benefit from a higher temperature but don't exceed the fifth level or you'll run the risk of burning the chips.
Pour the olive oil onto the griddle. Then, add the ground beef and use the sharp end of your spatula to break it into pieces, just as you would when cooking it in a skillet. Continue browning the ground beef for 7-10 minutes until no pink remains.
Once fully cooked, push the beef to the side and sprinkle it with taco seasoning. Add the onions to the griddle and allow them to soften and turn light brown.
Mix the taco seasoning into the beef until well incorporated. Use the spatula to turn the onions allowing them to brown evenly.
Once the onions have softened, mix them into the ground beef. Allow it to cook for 2-3 minutes. Then, remove the beef mixture and place it into a clean bowl.
Scrape away any pieces of food then place the tray of chips directly onto the griddle.
Top the chips with scoops of meat, generous spoonfuls of queso, and shredded cheese to your liking. Close the lid and allow the cheese to melt and chips to warm for 8-10 minutes. When done, the shredded cheese should have a gooey consistency.
Use a spatula to scoop servings onto plates or nacho baskets. Serve warm salsa, sour cream, guacamole, jalapenos and green onions as desired.