Preheat the oven to 375℉ and line a large rimmed baking sheet with parchment paper. (Note: you can use two smaller baking sheets and make two portions or use one large baking sheet.)
Beef Layer:
Preheat a cooking pan over medium heat and add oil. Add diced onion and sauté until transparent and starts to brown.
Add ground beef and break it up as much as you can. Cover and cook until cooked about half way, then break it up some more and add the seasoning. Mix well and continue to cook until meat is fully done.
Stir black beans into the ground beef and let them heat through for a minute or two. Take the pan off heat.
Assembling and Baking Nachos:
Spread the tortilla chips on the prepared baking sheet in an even layer but overlapping each other slightly.
Evenly spread the grated cheese over the chips covering the chips evenly. TIP: I like to pop the chips in the oven for a minute or so for the cheese to start melting at this point, but that's optional.
Spread cooked beef and bean mixture evenly over the cheese and bake for about 7-10 minutes.
Take the chips out of the oven and it's time to add your toppings.
Make sure to spread the toppings evenly throughout, so all chips have even coverage.
Notes
*More Options for Toppings:
Change up the meats. Chorizo makes a wonderful substitution to beef, so use Mexican chorizo and cook it the same way you would the beef topping. You can also use Chicken, simply cook it and dice it before adding to nachos.
Make it meatless. If you don’t wish to use meat at all, simply increase amount of vegetables and beans.
Use refried beans instead of black beans if you prefer.
Use pico de gallo, sour cream, Guacamole, and/or Salsa as toppings of your choice. Use them all or make your own combinations.