Start by heating olive oil in a large pot over medium heat. Once warm, toss in your diced onion and sauté until translucent—about 2–3 minutes. Add chopped celery and carrots and cook another 4–5 minutes until they begin to soften. Stir in minced garlic and Italian seasoning, cooking for just a minute to release their aroma.
Pour in the chicken broth and bring everything to a gentle boil. Lower the heat and let the soup simmer for around 10–15 minutes, allowing the vegetables to become tender and the flavors to meld. This step builds the rich, savory base that makes this soup so cozy.
Once the veggies are tender, stir in the cooked shredded chicken and tortellini. Keep the soup at a simmer while the tortellini cooks through. Most fresh or refrigerated tortellini only need 4–5 minutes—don’t overcook, or they’ll turn mushy.
Season your soup with salt and pepper to taste. Ladle into bowls and top with chopped parsley for a pop of green and added freshness. Pair it with a slice of crusty bread or garlic toast for the ultimate meal.