Heat olive oil in a large plot. Add onions and simmer on medium heat until semi-soft; stir in garlic. Be careful not to burn. Add ground beef and cook until all pink is gone; drain.

In the pot with drained beef, gently stir in tomato paste and tomato sauce. Mix in oregano, basil, Worcestershire sauce, sugar, red pepper flakes, mushrooms, bay leaves, and salt; bring to a boil. Turn heat down to low and simmer for about 2 hours.