Preheat oven to 400 Degrees and coat a 13x9 baking dish with cooking spray. Then set aside.
In a large skillet over medium-high heat add in olive oil. Once the oil is hot add the onions and cook 3-4 minutes, stirring occasionally.
Add the ground beef, parsley, rosemary, thyme, salt, and pepper. Cook for 6-8 minutes and break apart the ground beef with meat chopper or spoon. Stir occasionally until meat is completely browned.
Add in garlic and cook for an addition 1 minute.
Add the Worcestershire sauce, flour and ketchup to the ground beef mixture. Stir until fully incorporated and cook for 1 minute.
Add the beef broth, frozen peas and carrots and frozen corn kernels. Cook until the beef broth begins to boil. Then, reduce heat and let simmer for 4-5 minutes. Stir occasionally.
In the prepared baking dish spread out the ground beef filling. Make sure to spread it out into an even layer.