01 - Preheat oven to 400°F. Prick potatoes several times with a fork, rub with olive oil and a sprinkle of salt. Place directly on the oven rack and bake for 60 to 70 minutes until the skins are crisp and insides are tender.
02 - While potatoes bake, heat olive oil in a skillet over medium heat. Add diced onion and cook until softened, about 2 to 3 minutes. Stir in minced garlic and cook for an additional 30 seconds.
03 - Add ground beef to the skillet, breaking it up with a spoon. Cook until browned and cooked through. Drain excess fat if needed.
04 - Sprinkle taco seasoning over the browned meat, pour in water, and stir to combine. Simmer for 3 to 4 minutes until mixture thickens. Season with salt and pepper if needed.
05 - Once potatoes are finished baking, let cool slightly. Cut a lengthwise slit in each potato and gently fluff insides with a fork.
06 - Fill potatoes generously with taco meat. Top with shredded cheese, tomatoes, sour cream, olives, avocado, green onions, cilantro, and salsa or hot sauce as desired.
07 - Transfer immediately to serving plates, allowing guests to customize toppings as preferred.