Combine the Base: In a slow cooker, add the chicken breasts, chicken broth, soy sauce, oyster sauce, garlic, and ginger. Stir to combine everything well.
Cook Low and Slow: Cover and cook on low for 6-8 hours or on high for 3-4 hours, until the chicken is tender and cooked through.
Prepare the Noodles: About 30 minutes before serving, cook the Lo Mein noodles according to package instructions until al dente.
Shred the Chicken: Once the chicken is ready, remove it from the slow cooker and shred it using forks. Return the shredded chicken to the pot.
Add Noodles and Veggies: Stir in the cooked noodles and mixed veggies. Toss everything together until combined.
Thicken the Sauce: If desired, mix cornstarch with a little water to create a slurry, then stir it into the sauce to thicken. Season with salt and pepper to taste.
Serve and Garnish: Serve hot, garnishing each bowl with chopped green onions for added freshness.
Notes
Use fresh ingredients for better flavor. Avoid overpacking the slow cooker for even cooking.