Slow Cooker Adobo Chicken

Ingredients:
- 1 small sweet onion, sliced (optional)
- 8 garlic cloves, crushed
- 3/4 cup soy sauce
- 1/2 cup vinegar
- 1 (3 lb) whole chickens, cut into pieces

Directions:
- Place chicken in a slow cooker. In a small bowl mix the onion, garlic, soy sauce, and vinegar, and pour over the chicken. Cook on Low for 6 to 8 hours.