Peel and chop the onion. Heat 1 tablespoon of oil. Sauté onion in it. Add frozen spinach and 100 ml water. Cover and let thaw for about 15 minutes. Season with salt and pepper.
Heat 1-2 tablespoons of oil in a large frying pan. Fry uncooked Maultaschen in it for 6-8 minutes on each side. Meanwhile wash the wild garlic, shake dry and cut into fine strips. Stir with cream cheese and milk until smooth.
Take out the Maultaschen. Heat the wild garlic sauce in the frying fat. Season to taste with salt and pepper. Arrange Maultaschen with spinach and sauce.