Gather all of the ingredients to make Chicken Tortellini Soup and prep your vegetables.
In a large soup pot, heat 1 tsp of oil over medium/high heat, until glistening.
Add 1 chopped carrot, 1 chopped stalk of celery, 1/2 of a chopped onion, and 1 minced clove of garlic. Cook for about 3 minutes or until the onions are translucent and the garlic is fragrant.
Keep the vegetables in the pot, but scoot them to the side of the pot to make room to sear the chicken breast. Add in 1 large or 2 small chicken breasts and season with 1/2 tsp salt and 1/2 tsp of pepper. Sear the chicken for about 2-3 minutes on each side or until each side is golden brown.
Add in 4 cups of chicken broth. Season the broth with 1/2 tsp of salt and 1/2 tsp pepper. Bring the broth to simmer on low/medium heat and cook covered for about 45 minutes.
Remove the chicken and add in a 9 oz package of fresh cheese tortellini. Simmer for another 5-10 minutes or until the tortellini are softened.
Shred the chicken and add chicken back into the soup.
Add the juice from 1/2 of a lemon, 2 tbsp of parsley, and salt and pepper to taste.
Serve with a drizzle of olive oil and fresh parsley.