1. Roll the chicken in a mixture of butter, onion, corriander and salt to coat well.
2. Place in the crock pot.
3. Pour in the broth and lemon juice.
4. Remove chicken when done.
5. Stir together the yogurt and flour until well blended and whisk into broth.
6. Pour some over chicken and reserve the rest of the sauce for the table.
7. I like this with rice pilaf and a salad.
8. Cook for 8 hours on low, 4 hours on high.