In a large pot, cook ground beef and onions over medium-high heat until the beef is browned.
Drain any excess grease from the pot. Add the diced tomatoes, water, beef consomme, tomato soup, diced celery, diced carrots, and dried thyme to the pot. Stir to combine.
Bring the soup to a boil, then reduce the heat to medium-low. Cover and simmer for 40 minutes, or until the vegetables are tender and the pasta is cooked through. Stir occasionally.
Season with salt and pepper to taste. Serve hot.
Notes
This soup can be made ahead of time and reheats well. For a thicker soup, you can reduce the liquid during simmering or add a cornstarch slurry.