1 - Heat the oil in a skillet over medium heat.

2 - When hot, add the diced onion and cook until lightly browned.

3 - Add the curry powder and salt to taste and toast for a few seconds.

4 - Add the chopped tomatoes and the water, stir well, and cook until the tomatoes begin to break down, 5-7 minutes.

5 - Add in the chopped (or baby) spinach and cook for 7-10 minutes more, until soft and wilted.