Chicken Casserole with stalks

2 stalks celery , diced 1 medium onion , diced 1 clove garlic , finely diced 2 T canola oil 1 T butter 1/3 cup flour 1 t salt , separated 1/4 t pepper 4 1/2[...]

2 teaspoons olive oil 1 kg skinless chicken thigh , trimmed of fat and cut in half 1 large brown onion, finely sliced 2 stalks celery , chopped 2 teaspoons[...]

2 teaspoons olive oil 1 kg skinless chicken thigh , trimmed of fat and cut in half 1 large brown onion, finely sliced 2 stalks celery , chopped 2 teaspoons[...]