Place a large pot over medium-high heat. Drizzle with olive oil and add onion, sautéing for about 3 minutes until translucent.
Add carrots, celery, and garlic, sautéing for 4 minutes.
Add the chicken broth, chicken breast, oregano, salt, and pepper. Simmer and cook for about 15 minutes, until chicken is cooked to 165 degrees internally.
Remove chicken from the liquid and shred.
Add the gnocchi, spinach, heavy cream, and shredded chicken into the pot. Bring to a simmer and cook for about 3 minutes, until gnocchi is fork tender.
Taste and adjust with salt and pepper if necessary. Serve and enjoy!