Spray crockpot with non-stick spray.
Place chicken breasts in the middle in a single layer in the crockpot.
Place diced red potatoes on one side of the chicken and the green beans on the other side.
Top with minced garlic and chopped onion.
Pour the Italian salad dressing over top of all the chicken and vegetables.
Add pepper, to taste.
Cook on low for 4 - 6 hours till chicken is cooked through and potatoes are tender.
If desired, you can shred the chicken. I like to leave it whole but it is very tender and most likely will fall apart while taking out of crockpot.