01 - Place chicken breasts in the bottom of a 5-6 quart slow cooker.
02 - Add sliced carrots, diced onion, minced garlic, chicken broth, Italian herbs, salt, and pepper to the cooker. Stir gently to distribute seasonings.
03 - Cover and cook on low for 6-7 hours or high for 3-4 hours, until chicken is tender and fully cooked.
04 - Remove cooked chicken breasts and shred using two forks. Return the shredded meat to the slow cooker.
05 - Stir in evaporated milk (or half-and-half) and cubed cream cheese. Mix until the cream cheese has melted and the sauce is smooth.
06 - Add tortellini and baby spinach to the pot. Stir, cover, and cook on high for an additional 15-20 minutes until tortellini is tender and spinach is wilted.
07 - Stir in Parmesan cheese just before serving. Taste and adjust seasoning if necessary.