First, place the low carb tortillas on a clean work surface and allow them to rest at room temperature. This simple step prevents cracking later, especially if they were refrigerated. Meanwhile, prepare all toppings so everything is ready when the beef finishes cooking.

Next, heat a large skillet over medium heat. Once the skillet feels warm when you hold your hand above it, add the oil and swirl it gently to coat the entire surface. Allow the oil to heat for about 30 seconds, until it shimmers slightly.

Then, add the ground beef to the skillet. Immediately begin breaking it apart using a wooden spoon or spatula. Continue stirring frequently so the meat cooks evenly and does not form large clumps. As the beef cooks, you will hear a steady sizzling sound and see the color gradually change from pink to brown.

After that, continue cooking the beef for 6 to 8 minutes, stirring occasionally. Make sure most of the moisture evaporates and the beef develops slightly darker browned edges. This stage adds deeper flavor and improves texture.

Once the beef is fully browned, sprinkle the taco seasoning evenly over the meat. Then, pour in the water. Immediately stir thoroughly so the seasoning coats every piece of beef. The mixture will look slightly glossy and aromatic.

Next, allow the beef to simmer gently for 2 to 3 minutes. During this time, the liquid will reduce and form a light coating around the meat. If the mixture looks too dry, add one extra teaspoon of water. However, avoid adding too much liquid, since the filling should remain rich and concentrated.

Afterward, remove the skillet from heat and let the beef rest for 2 minutes. This brief resting period allows the juices to settle and improves the final texture.

Meanwhile, warm the tortillas. Place them in a dry skillet over medium-low heat for about 20 to 30 seconds per side. Alternatively, warm them in the microwave between paper towels for 20 seconds. The tortillas should feel flexible and soft, not crisp.

Then, assemble the tacos. Spoon an even portion of the warm beef mixture into the center of each tortilla. Spread the beef in a line rather than piling it into one spot, which makes folding easier.

Next, sprinkle shredded lettuce evenly over the beef. Then, add diced tomato and grated cheddar cheese. The cheese will begin melting slightly from the heat of the beef.

If using optional toppings, add avocado slices and a small spoonful of sour cream. These additions provide extra richness and balance the spices.

Finally, fold each taco gently and serve immediately while warm. The tortillas should feel soft, the beef juicy, and the toppings fresh and crisp.