- Heat the coconut oil in a large pot over medium heat. Add the diced onion and sauté until translucent, about 5 minutes. 
- Stir in the garlic and ginger, cooking for another minute until fragrant. 
- Add the mustard seeds and cumin seeds to the pot. Cook for about 30 seconds until the seeds begin to pop. 
- Stir in the turmeric, coriander, and chili powder, cooking for another minute to release the spices' flavors. 
- Pour in the coconut milk and vegetable broth, stirring to combine. Bring the mixture to a gentle simmer. 
- Add the cubed tofu, diced tomatoes, and green beans to the pot. Season with salt to taste. Cover and let simmer for 15-20 minutes, stirring occasionally, until the green beans are tender. 
- Stir in the spinach leaves and cook for an additional 2-3 minutes until wilted. Adjust seasoning if needed. 
- Serve hot, garnished with fresh cilantro. This curry pairs well with rice or naan.