INGREDIENTS
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1 tablespoon unsalted butter
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1 cup chopped red onion
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4 large eggs
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1 cup whole milk
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1 cup heavy whipping cream
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1 teaspoon ground black pepper
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6 cups (Â 1/2-inch) cubes cornbread
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1 (7-ounce) jar diced pimiento peppers, drained
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2 cups fresh baby spinach
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1 cup cooked ham, cubed
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1 cup shredded Gruyère cheese, divided Garnish: ground black pepper