INGREDIENTS
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1 deep dish pie shell (9 inch)
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1 lb ground beef
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1/3 cup chopped onion
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4 eggs
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1/2 cup mayonnaise
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1/2 cup skim milk
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2 tablespoons flour
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1/4 teaspoon dried oregano
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1/2 teaspoon salt
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1/4 teaspoon fresh black pepper
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6 ounces sharp cheddar cheese, shredded, divided