1. Heat olive oil in a medium saucepan over medium-high heat. Add onion. Cook for about 5 minutes or until soft.
2. Add garlic and thyme; cook 1 minute.
3. Add the beans, water, tomatoes, and broth. Increase heat to high until stew begins to simmer.
4. Reduce heat; let simmer for about 5 minutes, stirring. Add more water, if needed.
5. Stir in the spinach, and cook until wilted.
6. Add chicken; cook for 2 minutes. Season with salt and pepper.