"This is fast and simple to make, and it is so good. Also all ingredients may be doubled for a larger casserole...."
INGREDIENTS
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1 -1 1/2 cup tuna, drained
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1 small onion, chopped
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2 tablespoons finely chopped celery (optional)
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1/4-1/3 cup mayonnaise (Hellman's is best)
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12 slices of favorite bread
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6 slices swiss cheese (or any kind desired)
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1 (10 ounce) can cream of chicken soup, undiluted
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1/2 cup half-and-half or 1/2 cup milk