Wash the octopus well and then clean it.
Put the octopus in a saucepan and simmer it for 10 minutes.
Add oil and the onions and saute for another 10 minutes. Finish roasting by adding the wine and then
add the tomatoes, salt and pepper for taste.
Let the octopus become tender and add more water if required.
Cut in pieces and serve in a long plate.