"TESTED & PERFECTED RECIPE - This elegant strata -- with spinach, cheese & cubes of bread baked in custard -- is perfect for entertaining...."
INGREDIENTS
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1 pound bag chopped frozen spinach, thawed
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3 tablespoons unsalted butter
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1 large yellow onion, chopped (about 2 cups)
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3 garlic cloves, minced
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12 ounces (3/4 pound) Italian sandwich bread, cut into 1-inch cubes (about 11 slices or 8 cups)
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6 ounces (1-1/2 cups) coarsely grated Gruyère
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2 ounces (2/3 cup) finely grated Parmigiano-Reggiano
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9 large eggs
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2-3/4 cups half-and-half
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2 tablespoons Dijon mustard
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1-3/4 teaspoons salt
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3/4 teaspoon black pepper
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1/4 teaspoon ground nutmeg