Saute onion, celery (if using) and garlic in a little oil till onion softens.
Add carrots, zucchini, and other veggies. Saute for 3 - 5 minutes.
Return beef to pan with veggies.
Add pasta sauce. If you are using a plain sauce (like a passata), then season with salt, pepper, basil, and oregano. If you are using a commercial sauce that already has flavourings added, you should be able to get by without it.
Simmer for 30 minutes, or more if you have the time. Or less if you don't!