Set your oven to 375°F (190°C). Line a baking sheet with parchment paper.
Cook the Beef
Heat olive oil in a skillet over medium heat. Add ground beef, breaking it apart with a wooden spoon. Cook until browned, about 5-7 minutes.
Season & Sauce It Up
Drain excess fat from the beef. Stir in smoked paprika, garlic powder, onion powder, salt, and pepper. Pour in the BBQ sauce and mix well. Simmer for 2 minutes, then remove from heat.
Assemble the Nachos
Spread tortilla chips in an even layer on the baking sheet. Sprinkle half the cheese over the chips. Spoon the BBQ beef mixture on top. Add the remaining cheese, and if using - jalapeños, and red onion.
Bake to Perfection
Place the nachos in the oven and bake for 8-10 minutes, or until the cheese is fully melted and bubbly.
Add the Fresh Toppings
Remove the nachos from the oven. Sprinkle chopped tomatoes and cilantro over the top. Drizzle with sour cream and add diced avocado if using.