Turkey, Potato, and Onion Casserole
Ingredients:
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2 ½ pounds russet potatoes, peeled and cut into 1/4-inch slices
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1 pinch salt to taste
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2 cups diced cooked turkey
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1 tablespoon extra-virgin olive oil
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1 medium onion, sliced horizontally
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¼ cup unsalted butter
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3 tablespoons all-purpose flour
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1 ⅔ cups turkey stock
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1 ½ cups grated Parmigiano-Reggiano cheese
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1 cup sour cream
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¼ teaspoon ground black pepper, or to taste
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½ cup bread crumbs
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2 tablespoons chopped fresh parsley, or to taste