Drizzle a large skillet with olive oil. Add the diced onion and cook over medium-high until softened about 2 minutes.
Add the ground beef, garlic salt and black pepper to the pan. Cook the meat over medium-high until no pink remains around 12-15 minutes.
Drain all excess fat from the pan, then add the Worcestershire sauce. Cook for 2 minutes stirring to fully distribute.
Remove from the heat and spread onto a large paper towel lined baking sheet. Place into the fridge to cool.
Divide the cooled beef and package into quart size plastic freezer bags, 2 cups per bag and label.
Press flat, seal and freeze.