Skin and clean the octopus. Cut the tentacles into sections.
Peel the garlic and onions and slice the vegetables (except the potatoes). Sauté in olive oil and add the octopus, bay leaves and bouquet garni. Pour in the white wine and cook on a bare simmer for 2 hours.
Peel the potatoes and chop them into cubes. Cook them in boiling salted water.