Creamy chicken with rice - With legumes

3/4 lb carrot , cut into 1-inch lenghts 2 stalks celery , thinly sliced 1 small onion , chopped 1/4 cup all-purpose flour 1 1/2 lbs boneless skinless chicken[...]

1 tablespoon olive oil 6 boneless skinless chicken thighs 1 tablespoon butter 1 small yellow onion , chopped 3 carrots , chopped 2 celery ribs , chopped 6[...]

8 boneless chicken breasts , pounded and seasoned with salt and pepper 1/2 tablespoon butter 1/2 tablespoon olive oil 4 shallots , minced 1/2 lb shiitake[...]