In a large skillet over medium heat, cook the ground beef, breaking it up as you go.  When it is cooked through, drain off the excess grease and return it to the pan.  Add chili powder, onion powder, garlic powder, paprika, oregano, cumin, salt, and pepper to the meat.  Stir in 1 ½ cups of water and bring to a boil.  Reduce the heat and simmer for 5-7 minutes until the sauce has thickened and most of the liquid has evaporated.

To assemble the salad, arrange lettuce in a large salad bowl or on individual plates.  Add the taco meat and top with tomatoes, onion, cheese, avocado, jalapeno, cilantro, and sour cream.  Enjoy!