In a medium saucepan, heat the vegetable oil, add the garlic and cook until fragrant, about 1 minute. Then add the frozen spinach and cook until well heated.

Add the milk, water, nutmeg and season with salt and black pepper. Gradually incorporate the polenta, always stirring. Once the polenta starts to boil, reduce the heat and continue to stir for another 5 to 8 minutes until it thickens. Careful, it might splatter.

Adjust for salt and black pepper.

Pour the polenta in the prepared dish and let it cool. Once warm to cold you can cut the polenta into small rectangles and brown it in a frying pan with a bit of butter. Serve and enjoy!