Potato And Fennel Gratin

• 3 fennel bulbs, sliced 1/4 inch thick
• 1 large onion, sliced into half moons
• 2 tablespoons extra virgin olive oil
• 2 tablespoons butter
• 3 pounds russet potatoes, peeled and thinly sliced
• 1 cup heavy cream
• 1/4 cup fresh thyme leaves
• 1 teaspoon salt
• 1.5 teaspoons cracked black pepper
• nutmeg, optional
• 2.5 cups Gruyere cheese, shredded

1. Preheat the oven to 350 degrees F. Butter the inside of a 9 x 13 or 10 x 15 baking dish.
2. Heat a large skillet over medium high heat. Add butter and olive oil, then saute fennel and onions until slightly softened, about 5 minutes.
3. Place a layer of the potatoes on the bottom, overlapping edges slightly. Drizzle cream over the potatoes and then spread some of the onions and fennel over. Sprinkle with thyme, salt, pepper and nutmeg (if using). Repeat layers and then spread gruyere cheese over the top. Press layers down slightly at the end.
4. Bake at 375u0b0 for 60 minutes or until cheese is golden brown and cream has thickened. Remove from oven and let sit for about 15 minutes before cutting to serve.

fennel bulbs, onion, extra virgin olive oil, butter, russet potatoes, heavy cream, thyme, salt, cracked black pepper, nutmeg, gruyere cheese

Taken from food52.com/recipes/712-potato-and-fennel-gratin (may not work)