Heat a skillet over medium heat and add the olive oil. Add the onions and let them sauté for four to five minutes. Then, add the ground beef and let it cook and brown while breaking it up with a fork.

Add Gefen pasta sauce and spices. Next, add in the vinegar and Worcestershire sauce. Bring to a simmer, lower the heat to low and cook until slightly thickened, about five minutes. Spoon beef mixture onto hamburger buns and serve.