Brown your ground beef for tacos, drain, then add homemade taco seasoning and about 3/4 cup of water.
Stir, bring to a boil, then simmer for a few minutes.
Note: You might also add in 1/4-1/2 tsp onion powder -- I somehow didn't have any in the house, so just skipped it. You can also brown the beef with a little fresh onion instead. :)