Place chicken breasts into the crockpot. Sprinkle with Italian dressing mix and stir. Make the cream of chicken soup.
Layer chicken soup on top of chicken. Cover and cook on low for 3-4 hours. (Your crockpot may cook faster or slower - this is an estimate)
When the chicken is tender, shred with two forks and give everything a stir to combine.
Chop zucchini and bell peppers; slice the mushrooms.
Add laughing cow cheese and vegetables to the crockpot and stir well. Cook for another 30 minutes, until the cheese is melted and veggies are softened and heated through.
Turn off heat and let stand for a few minutes to allow sauce to thicken a bit.
Serve over rice or pasta. Enjoy!
For the Cream of Chicken Soup:
Melt butter in a saucepan over medium-low heat. Whisk in flour. Continue whisking until the mixture is smooth and bubbly, making a roux.
Slowly add in chicken broth and milk, whisking continuously. Whisk until combined. Bring to a gentle boil and simmer for 5-10 minutes, until thickened. Mixture will continue to thicken as it cools. Salt and pepper to taste.