Creating these delightful Ground Beef Tostadas is simple and requires just a few easy steps:

1. Heat the Oil: In a large skillet, heat the olive oil over medium heat.
2. Cook Onion and Garlic: Add the diced onion and minced garlic. Sauté until the onion is translucent, about 3-5 minutes.
3. Cook Ground Beef: Add the ground beef to the skillet. Use a spatula to break it apart, cooking it until browned, about 7-10 minutes.
4. Season the Beef: Stir in the taco seasoning and mix well. Add a splash of water if necessary to combine flavors.
5. Warm Black Beans: In a separate small pot, heat the black beans over low heat until warm, stirring occasionally.
6. Prepare Tostada Shells: While the beef is cooking, place the tostada shells in the oven at 350°F for about 5-7 minutes until crispy.
7. Assemble Tostadas: Begin layering the tostadas – start with a base of ground beef, followed by black beans, and then top with shredded lettuce, diced tomatoes, and cheese.
8. Add Toppings: Finish off with a dollop of sour cream, salsa, avocado slices, and a sprinkle of fresh cilantro.
9. Serve Immediately: Serve the tostadas while they’re still warm with lime wedges on the side.

These clear and concise steps will get you on your way to enjoying scrumptious Ground Beef Tostadas in no time!