Tuna Toast
1.
Tuna de-oiled and spare
2.
Chopped onion and set aside
3.
Put tuna, onion, sauce in a bowl and stir
4.
Put cheese slices on the bread
5.
Put tuna on top, then put cheese
6.
Put another slice of bread after step 5
7.
Melt butter in a pan and bake it over low heat until golden brown