Ingredients
Preparation
Step 1
Preheat the oven to 425°F.
Step 2
Toast the fennel seeds in a small saucepan over medium-high heat 2 to 3 minutes, until they release their aroma and are a light gold color. Using a mortar and pestle, pound the seeds coarsely.
Step 3
Trim the root end of the fennel, cut the stalks off where they meet the bulb, and peel off any outer layers that are brown or bruised. Cut the bulb in half lengthwise, leaving the core intact. Place the halves, cut side down, on a cutting board, and slice the fennel thinly lengthwise. You should have about 6 cups of sliced fennel.
Step 4
Toss the fennel in a large bowl with the onion, thyme, bay leaves, fennel fronds, fennel seeds, and 1/3 cup olive oil. Season with 1 1/2 teaspoons salt and a pinch of pepper.
Step 5
Slice the potatoes on a mandoline into 1/16-inch-thick slices. Toss the potatoes in a medium bowl with the cream and 1 teaspoon salt.
Step 6
Add the potatoes and parsley to the fennel, scraping all the cream into the bowl. Toss well to combine, and taste for seasoning.
Step 7
Arrange one layer of potato slices in the pan, overlapping them slightly, on the bottom of a gratin dish. (For this recipe, I like to use a copper or black iron dish, so the potatoes get extra crisp.)
Step 8
Toss the remaining fennel-potato mixture again, and arrange it over the layer of potatoes. Pour all the remaining creamy juices over the top. Bake about 45 minutes, until the potato is cooked and the fennel is golden and slightly crispy on top.
