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["Preheat oven to 400u00b0. Trim tops from beets; set aside half of tops (reserve remainder for another use). Scrub beets, pat dry, and slice 1/4"" thick. Toss in a large bowl with 4 tablespoons oil; season with salt and pepper. Scatter marjoram sprigs across a rimmed baking sheet and arrange beets on top in as even a layer as possible (some overlap is okay). Roast, tossing occasionally, until beets are tender, 15-20 minutes. Remove from oven and toss in reserved beet greens; roast just until slightly wilted, about 2 minutes. Let cool.", "Scatter marjoram sprigs across a rimmed baking sheet and arrange beets on top in as even a layer as possible (some overlap is okay). Roast, tossing occasionally, until beets are tender, 15-20 minutes. Remove from oven and toss in reserved beet greens; roast just until slightly wilted, about 2 minutes. Let cool.", "Meanwhile, whisk creme fraiche, yogurt, and 1 teaspoon vinegar in a small bowl; season with salt; set aside.", "Smash sesame seeds, 2 tablespoons marjoram leaves, and a generous pinch of salt in a mortar and pestle to combine. (Alternatively, chop with a knife.) Transfer to a small bowl and mix in remaining 1 tablespoon oil; set sesame salt aside.", "Drizzle roasted beets and greens with remaining 1 tablespoon vinegar; season with salt and pepper. Spoon reserved creme fraiche mixture between 2 platters and arrange beets and greens on top; sprinkle with sesame salt.", "Do ahead: Beets (without greens) can be roasted 1 day ahead. Let cool; cover and chill. Bring to room temperature before using; saute greens separately. Sesame salt can be made 2 days ahead; cover and chill."]
