Place chicken breasts in crockpot. I like to use a crockpot liner to avoid making a mess.
Cover crockpot and cook on low 2-3 hours. (Yes, just the chicken and nothing else!)
When done, transfer cooked chicken to a plate.
Remove the liquid from your crockpot. (If you use a liner, just toss it away and get another one!)
Replace the chicken back in the crockpot.
Gather ingredients for the sauce.
Place ingredients in a small bowl.
Cover chicken with sauce.
Replace lid on crockpot and cook on high 30 minutes.
Transfer to a plate and add basil if desired. Serve and enjoy!