Apple-Potato Gratin With Caramelized Onions

• 1 tablespoon butter
• 5 medium onions, halved and thinly sliced
• 3/4 cup plus 2 Tablespoons heavy cream
• 2 teaspoons fresh thyme
• 2 teaspoons fresh sage, chopped fine
• 1/2 teaspoon fresh ground black pepper
• 1 teaspoon salt
• 2 tablespoons boiled cider
• 3 apples, peeled and sliced thin
• 5 small-medium gold potatoes, peeled and sliced thin
• 1/4 cup shredded parmesan cheese (or asiago or whatever you want)

1. In a heavy bottomed pan, melt the butter over medium low heat. Add the onions and cook, stirring occasionally until the onions are carmelized with a deep golden color.
2. While the onions are carmelizing, Combine the cream, sage, thyme, salt, pepper and boiled cider in a small bowl. Put half the mixture in a bowl with the apple slices and half with the potato slices and toss to coat.
3. Preheat the oven to 425 and grab your gratin pan (a deep dish pie plate works well).
4. When the onions have finished cooking, place half in the bottom of the pie plate, then place a layer of apples and a layer of potatoes on top. Repeat. Use a spatula to get any leftover cream out of the bowls - no wasting the good stuff! Cover tightly with aluminum foil and cook for 90 minutes.
5. Remove the foil and cook, uncovered for another 40 minutes, checking occasionally to make sure it's not over-browning. When there are 15 minutes remaining, sprinkle the parmesan cheese over top. Enjoy!

butter, onions, heavy cream, thyme, fresh sage, fresh ground black pepper, salt, boiled cider, apples, gold potatoes, parmesan cheese

Taken from food52.com/recipes/38653-apple-potato-gratin-with-caramelized-onions (may not work)