Add onion, stir and cook until soft, about 4 minutes, then add garlic and cook until lightly browned. Add celery and cook for another 3 minutes. Add broccoli and cook for another 2 minutes. While continuing to stir the broccoli mixture, add the thyme, curry powder and sea salt. Incorporate well. Add water and bring to a boil and cook, covered, until bright green and tender, about 20 minutes. Remove from heat, and let cool slightly.