Prepare the slow cooker by coating it with a light coating of cooking spray.
Season the chicken breasts with salt and pepper and place them in the bottom of the slow cooker.
Surround the chicken with sliced mushrooms, onions, and minced garlic.
In a medium-sized bowl, whisk together the cream of mushroom soup, cream of chicken soup, white wine, and Worcestershire sauce until smooth.
Pour the sauce mixture evenly over the chicken and vegetables in the slow cooker.
Cover and cook on low for 6 hours or high for 3 hours, until the chicken is tender and fully cooked.
Once cooked, remove the chicken breasts and shred them or slice them into bite-sized pieces. Stir the chicken back into the sauce.
Serve the stroganoff hot over cooked egg noodles, and garnish with fresh parsley if desired.