Curried Spinach from Botswana

Heat the oil in a skillet over medium heat. When hot, add the diced onion and cook until lightly browned. Add the curry powder and salt to taste and toast for a few seconds. Add the chopped tomatoes and the water, stir well, and cook until the tomatoes begin to break down, 5-7 minutes. Add in the chopped (or baby) spinach and cook for 7-10 minutes more, until soft and wilted.