Boil the potatoes in a pot for about 10-15 minutes
After 10minutes of boiling, you should drain out most of the water from the pot, butleave some in there - just enough to create steam inside.
Then addchopped onions and sliced sweet pepper. Cover with the lid and cook togetherfor 5 minutes.
Then add sardines, which were previously drained from their can to the pot. Stireverything well.
Add salt andpepper according to your taste and let it simmer for another 5-7 minutes undera closed lid or until potatoes are done.
Notes
In everyday cooking, I use onion and sweet pepper as a base for cooking. You can add them to pretty much any dish like rice, potatoes, meat, or even fish.