Step 1: Prepare Ingredients - Start by dicing the onion, slicing the carrots and celery, and mincing the garlic. Gather all your ingredients so everything is at hand when you start cooking.
Step 2: Combine Ingredients in Slow Cooker - In a large slow cooker, add all ingredients except for the fresh parsley, lemon juice, and egg noodles. Season generously with salt and pepper according to your taste preferences.
Step 3: Cook on Low Heat - Set your slow cooker on low heat and cook for 6-8 hours. This allows the chicken to become tender while allowing the vegetables to soften perfectly.
Step 4: Shred Chicken and Add Noodles - Once cooked, carefully remove the chicken breasts from the slow cooker and shred them using two forks. Return the shredded chicken back into the pot along with the egg noodles; stir well until they are submerged in broth.
Step 5: Finish Cooking Noodles - Cover the slow cooker again and let it cook on low for another 5-10 minutes until the noodles are just tender. Alternatively, cook the noodles separately if you prefer them al dente.
Step 6: Add Final Touches - Once everything is cooked through, stir in freshly squeezed lemon juice and chopped parsley right before serving for a burst of flavor and freshness. Enjoy this comforting bowl of goodness!