Fingerling Potatoes with Caviar and Smoked Salmon

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A fingerling potato is a small, stubby, finger-shaped type of potato which may be any heritage potato cultivars. Fingerlings are varieties that naturally grow small and narrow. They are fully mature when harvested and are not to be confused with new potatoes. Popular fingerling potatoes include the yellow-skinned Russian Banana, the orange-skinned French, and the Purple Peruvian. Due to their size and greater expense compared to other potatoes, fingerlings are commonly either halved and roasted as a side dish or used in salads. Preserved lemon, an essential ingredient in Moroccan cooking, is made by pickling lemons in salt, lemon juice, and olive oil.

Ingredients:

2 lemons
1/2 cup water
4 teaspoons coarse kosher salt
1/4 cup fresh lemon juice
1/4 cup extra-virgin olive oil
1/2 cup crème fraîche or sour cream
1 teaspoon (packed) minced fresh dill
1 teaspoon (packed) minced fresh cilantro
2 tablespoons olive oil, divided
1 1/2 teaspoons coarsely crushed cumin seeds
12 small fingerling potatoes, halved lengthwise (about 14 ounces)
3 ounces thinly sliced smoked salmon, cut into 1/2-inch-by-2 1/2-inch strips
1 ounce caviar
Small fresh dill sprigs

Preparation:

Using vegetable peeler, remove peel (yellow part only) from lemons. Simmer peel, 1/2 cup water, and 4 teaspoons kosher salt in heavy small saucepan over medium-high heat until salt dissolves. Reduce heat to low and simmer until liquid is reduced to 2 tablespoons and peel is tender, stirring occasionally, about 10 minutes. Transfer peel with liquid to jar. Add lemon juice and extra-virgin olive oil. Refrigerate at least 1 day and up to 1 week.

Drain peel; mince. Stir crème fraîche, minced dill, cilantro, and 1 tablespoon minced peel in small bowl. Cover and chill at least 2 hours and up to 8 hours.

Set rack at lowest position in oven and preheat to 450°F. Brush nonstick baking sheet with 1 tablespoon olive oil. Combine 1 tablespoon olive oil and cumin in large bowl. Add potatoes; toss to coat. Sprinkle with salt and pepper. Arrange potatoes, cut side down, on baking sheet and roast until tender and cut sides are brown, about 12 minutes. Cool slightly.

Arrange potato halves, cut side up, on platter. Top each with 1 teaspoon crème fraîche, 1 salmon strip, and 1/2 teaspoon caviar. Garnish with dill sprigs.