Cook the Ground Beef
Heat the olive oil in a large skillet over medium-high heat.
Add the diced onion and cook for 2–3 minutes until softened. Add the ground beef and cook, breaking it apart with a wooden spoon, until browned and cooked through.
Drain excess fat if necessary.
Season the Beef
Add the minced garlic, chili powder, cumin, paprika, salt, and black pepper.
Stir well and cook for about 1 minute to allow the spices to become fragrant.
Add the Taco Sauce
Pour in the tomato sauce and water.
Stir everything together and simmer for 4–5 minutes, allowing the sauce to thicken and coat the beef.
Warm the Tortillas
Warm the tortillas in a dry skillet for about 20–30 seconds per side.
Keep them covered with a clean kitchen towel so they remain soft while you prepare the tacos.
Assemble the Tacos
Fill each tortilla with seasoned ground beef.
Top with shredded lettuce, diced tomato, red onion, avocado, fresh cilantro, and lactose-free cheese or a dairy-free cheese alternative if desired.