1. In a medium baking pan, tip in the celery stalks
2. Preheat the oven to 375Â°F. (190Â°C.)
3. In a small bowl, mix in the tamari, water and chopped onions.
4. Pour this mix on top of the celery
5. Bake covered in a preheated oven 375Â°F.(190Â°C.) oven for one hour
6. Serve immediately.