INGREDIENTS
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2 (10 oz.) boxes frozen spinach, thawed and chopped
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1/2 (10.75 oz.) can condensed cream of mushroom soup
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1 cup sharp cheddar cheese, grated
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3/4 cup gruyere or swiss cheese, grated
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1 egg
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2 teaspoons Dijon mustard
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1/2 teaspoon garlic powder
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kosher salt and freshly ground pepper, to taste