Step 1
Season the fish with salt and pepper.
Step 2
In a large deep skillet heat the oil over medium high heat. Add the garlic and ginger and cook 2-3 minutes or until lightly browned. Stir in the curry powder, cumin and chili or cayenne and cook 30 seconds. Add the tomatoes, coconut milk and sweet potato and bring to a simmer. Cook until the sweet potato is tender, about 12-15 minutes.
Step 3
Nestle the spinach and fish into the liquid and simmer over medium until the fish is just cooked, about 2-3 minutes. Serve with rice, mint and lime wedges.
