INGREDIENTS
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3 lbs. ground chuck
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2 eggs
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1 cup dry bread crumbs
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1/2 tsp. salt
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1/4 tsp. black pepper
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2 (10.5 oz.) cans condensed French Onion soup divided
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2 Tbs. flour
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1/2 cup water
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1/2 cup ketchup
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2 tsp. Worcestershire sauce
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1 tsp. prepared yellow mustard
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2 cups sliced mushrooms (optional)