An easy, use whatever you have type recipe that I ended up with after craving Hamburger Vegetable Soup one afternoon. NOTE: This is just what I used because it's what I had on hand. Feel free to change amounts or ingredients according to what works for you.
In a large pot, brown the ground beef with the onion. Drain if necessary, add back to same large pot.
Add garlic, celery, carrots, beef broth, salt, pepper, and diced tomatoes. Bring to a boil then reduce to a simmer for as long as you'd like. Mine sat at a very low simmer for a couple hours until we were just about ready to eat.
About 15 minutes before serving, bring to a second boil. Add noodles, peas, and corn. Cook until noodles are done. Serve.
NOTE: It may be necessary to add 1-2 more cups of broth. The way I made this, the noodles soaked up a lot of broth and it was a very "thick" soup, almost a hotdish (especially what was leftover). Adding more broth will thin it out if you desire a more brothy bowl!