Heat a dash of oil in a frying pan, and add the sliced onion. Cook for a few minutes over a medium heat, until it's beginning to soften. Add the garlic and spices, and cook for another minute or so.

Next, add the cooked potatoes to the pan. Stir gently for a few minutes, until the potatoes are coated in the spices, and are beginning to crisp up.

Add the spinach, and allow it to wilt. You can add one handful at a time, if you don't have room for all the spinach in one go - it will create more room in the pan as it wilts down.

When the spinach has wilted, add the cream, and bring to a simmer. Season to taste with salt and pepper. When everything is piping hot, serve.