Over medium heat, place the onions, ground beef, and cooking oil in a large skillet. Break the beef apart with your spatula. Cook, stirring often, until the onions and beef are browned - about 15 minutes.
Add the garlic and stir into the beef and onions. Cook for 2-3 minutes.
Next, add the Worcestershire sauce, beef bouillon powder, salt, and ground black pepper. Stir well to combine. Continue to cook for 2-3 minutes more.
Remove from heat. Evenly distribute the cooked beef onto the bottoms of the four burger buns. Top with ketchup, mustard, and a few sweet pickles. (This is optional - you can top the sandwiches your way.) Serve with potato chips.
Nutritional value does not include sandwich toppings or sides.