This recipe doesn't produce a browned chicken but it's very, very tasty! The onion in this is just used for flavor, it's not eaten, so hopefully it would be OK for your BIL.
Fragrant Lemon Chicken—Crock Pot
1 apple, peeled, cored and quartered
1 stalk celery, chopped
1 (3 lb) whole chicken
Salt and black pepper to taste
1 small onion, chopped
½ tsp dried rosemary, crushed
1 lemon, juiced
1 c hot water
Place apple and celery in cavity of chicken. Rub skin with salt and pepper.
Place chicken in cooker. Sprinkle chopped onion, rosemary, and lemon juice over chicken. Add 1 c hot water and cover.
Cook on high for 1 hour. Switch to low, and cook for 6-8 hours.
-A balanced diet is a cookie in each hand