Heat about a tablespoon of oil in a pan.

If using fresh onion, add that and cook about 5 minutes until softened.

Add your salt, garlic, onion, and spices (chili powder, cumin, coriander, oregano, cayenne pepper), and cook for about 30 seconds.

Add the beef, and stir. The beef can be already cooked or uncooked. But, stir and cook until the beef is done.

Stir in the tomato sauce, broth, vinegar, and sugar and simmer for about 10 minutes. Add more salt, to taste.

To fry up the corn tortillas, just heat up about an inch of oil in a fry pan. You want it to be pretty hot, but not spitting-at-you-hot. Once it's heated, using tongs in one hand and a spoon in the other, place the tortilla in the hot oil, and fold over with the tongs. Hold the fold in place, and use the spoon to press down on the center of the fold...making sure the bottom of the taco shell is wide enough to hold the meat and fillings.