Slow Cooker Roast Chicken And Vegetables

[5] lb whole chicken

medium potatoes (sliced 1-inch thick)

sliced carrot or baby carrots

sweet onion (sliced into wedges)

rib celery (sliced)

whole clove garlic (peeled)

softened butter (divided)

sprigs fresh thyme or 1 sprig fresh rosemary

black pepper

Suggested seasoning choices: Rotisserie Chicken (BBQ dry rub, seasoned salt, lemon pepper, Herbs de Provence, Italian, or Mediterranean seasoning)