Place a frying pan on a stove set to medium-high heat. Heat oil in the frying pan. Now add in the garlic, onion, pepper, salt, and taco seasoning. Make sure you use a keto-friendly taco seasoning.
Put in the ground beef and allow to cook for 5 minutes. Stir occasionally until brown.
Use a cooking spray on a non-stick skillet. Place the skillet over medium-high heat. Place the bacon in the skillet and allow to cook properly. Remove and chop the bacon into crispy bits when cooked. You will use it for the topping. Chop the avocado, tomato, and onion into pieces to be used for topping too.
Spray the nonstick skillet again and place over medium-high heat. This time around, put in the cheddar cheese and allow to cook properly. Carefully turn it over and fry the other side until brown. If you prefer your cheese baked, then place it in an oven and bake until brown.
Now remove from heat and place on a plate. Carefully bend the cheese while it is still soft and very warm to make a shell shape. When becomes cool, the shell will harden.
Serve the beef in a plate with some salt and chili pepper sprinkled on top alongside the topping of bacon pieces, tomato, onion, and avocado. You can use mayonnaise too.