oopperavoileipä

/OH-pay-rah-voh-ee-LAY-ee-pà/
[Finnish]

"Opera sandwich." I have seen this described as dark rye bread topped with herring, sometimes decorated with chopped hard boiled egg and tomato or white bread, fried and spread with minced (US: ground) beef cooked with onions and cream and topped with a fried egg.

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