Prep the ingredients, then in a sauté pan on medium high heat add in the chopped mushrooms. Allow them to cook down and water release from them. Once the pan looks dry the water is gone and at this point you add in a little oil for cooking, the onions and the garlic. Continue to cook until the ingredients start to brown and are soft. Just before they are finished, toss in the thyme and cook until it's fragrant in the dish, about 1 minute. Then, turn the stove off and add the ingredients into the crockpot.
Pour the 2 cups of chicken broth into the crockpot without the cornstarch. Add in the chicken. Place the lid on the crockpot then cook on high for 4 hours or low for 6.
When the time is up and the chicken is tender, remove from the chicken from the crockpot, then shred and chop the chicken. Add the chicken back into the crockpot. Now, mix together the cornstarch and the other 2 cups of chicken broth. Once combined, pour the slurry into the crockpot and place the lid on. Allow to cook for 30 minutes to thicken.
After the time is up, return and add in the sour cream and stir until combined. The liquid should be much thicker now, if not, it will thicken more.
Now, add in the lasagna noodles and stir them in. Cover the crockpot and cook for a final 30 minutes. Return after the time is up and add in the kale and mozzarella. Stir everything in until the kale has withered, it may take 3-5 minutes.
Do your last taste for salt and pepper then serve with a garnishing of freshly grated parmesan cheese, enjoy.