INGREDIENTS
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10 small potatoes, peeled and quartered
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1 large onion, diced
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1 Tbsp oil
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4 Tbsp butter
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1 cup cottage cheese or sour cream
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1 cup shredded mozzarella or cheddar cheese, divided
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salt and pepper, to taste
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1 Tbsp all-purpose flour
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½ cup whole milk, plus a bit
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6 no-bake lasagna noodles