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Put oven rack in middle position and preheat oven to 425°F Grease a standard 12 cup muffin tin.
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Cook noodles in a pot of boiling salted water for about 5 minutes. Drain in a colander and rinse under cold water.
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Heat olive oil in large skillet over medium heat. Add onions to skillet and cook, stirring occasionally, until well browned, about 20 minutes.
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Transfer onions to a large bowl and stir in noodles, sour cream, and cottage cheese. Lightly beat eggs with salt and pepper, then stir into noodle mixture until combined well.
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Divide mixture among muffin cups and sprinkle breadcrumbs over each cup. Bake until puffed and golden, 20 to 25 minutes.
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Loosen edges of kugels with a thin knife and cool kugels in pan 5 minutes before serving.