Saute Veggies: Heat olive oil in a large pot and sauté diced onion, minced garlic, and celery until soft and fragrant.
Cook Meat: Stir in beef/sausage and break apart with a spoon so that it cooks, browning and then cooking through.
Add Broth and Sauce: Pour in beef broth and sugar-free tomato sauce, mixing well to combine the flavours.
Season the soup: Stir in Italian seasoning, diced zucchini and sprinkle with salt and pepper, then allow the soup to gently simmer for 20 minutes.
Add Pasta: Stir in cooked keto pasta or zoodles and cook for another 5 minutes to let flavours meld.
Rest & Serve: Allow the soup to rest for 5 minutes, top with fresh parsley and serve immediately as a delicious keto meal.