1. Preheat the oven to 415º F. 2. Slice the onion, break it into rings, and, in a strainer, rinse the rings under cold water. 3. Melt the butter in a small saucepan, add the garlic, and set aside. 4. Place a layer of potato on the bottom of an 8" springform pan, followed by layers of onion, butter, mozzarella, and Parmesan. 5. Grind some black pepper and a little sea salt. 6. Repeat the layers until you have used up all the ingredients, keeping a bit of butter to drizzle on the top. 7. Finish with potato and then drizzle on a little butter. 8. Spoon the milk over the top. 9. Place the springform pan on a baking sheet with a lip or flat pizza pan with a lip. 10. Bake for 1 hour, or until the top is golden brown and the potatoes are tender. 11. Check in 45 minutes; if the top is getting too brown, cover with foil. 12. Cool for 10 minutes before serving. 13. Unclip the sides of the pan and remove, and transfer to a plate for serving. ---------------------------------------------------------------------------
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Ingredients