INGREDIENTS
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1 egg
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1/2 cup coca cola, divided
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1/2 cup crushed saltine crackers
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1/4 cup finely chopped onion
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6 tablespoons creamy French salad dressing, divided
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2 tablespoons grated Parmesan cheese
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1/4 teaspoon salt
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1 1/2 pound ground beef
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6 hamburger buns, split