❶ Cook the Ground BeefIn a skillet, cook the ground beef over medium heat until browned.Break it apart with a spoon while cooking.Drain excess fat, if necessary.❷ Cook the OnionAdd the chopped onion and cook until softened, about 3 minutes.❸ Add Taco SeasoningStir in the taco seasoning and water, and simmer for 5 minutes.❹ Warm the Taco ShellsWarm the taco shells in the oven as per the package instructions.❺ Assemble the TacosAssemble tacos by spooning the beef mixture into the shells and adding your favorite toppings.❻Serve hot and enjoy!