Sautee minced onions (half will do)
Add salt and pepper to taste
Add half a cup of sliced mushrooms
Let it simmer
Then add meshed tuna flakes (two cans will do or your preference)
Mix the ingredients well
Then add mayonnaise to it over a light flame
Add more pepper (depends on how spicy you want it to taste)
On each sides of the oatmeal bread/white bread, spread the tuna-mushroom combo
Add iceberg lettuce and tomato
Then toast it!
(Best served with chilled fresh pineapple juice.)
Eat well 
A former educator and now working as a freelance writer. Simply living her own version of life’s passion – music, mobile photography, story telling, road trips and food trailing! 🙂