Heat a large pot or Dutch oven 6qt or larger on the stove top. Add vegetable oil. Once oil is hot, sear onions until they are soft. Then add garlic, sear for 30-60 seconds or until fragrant.
Add ground beef. Season with 1 tsp of salt and 1/2 tsp of black pepper. Sear until it is no longer pink-ish.
Add celery, whole tomatoes, beef broth, potatoes, thyme and oregano. Bring to a boil, then let soup simmer for 5-7 minutes, or until potatoes are softened.
Add frozen mixed vegetables, bring to a boil again.
Add granulated sugar and beef bouillon. Stir, then add salt to taste.
Remove from heat. Serve and enjoy!