For the Pickled Octopus variation: Prepare and wash the octopus as described above. Place the head and tentacles in a pan with 6-8 tbsp water, cover, and simmer for 1-1.25 hours until tender. Test with a skewer. Drain and set aside to cool.
Cut the cooled octopus flesh into 12mm (0.5 inch) strips and pack loosely into a screw-topped jar.
Mix olive oil, red wine vinegar, minced garlic, salt, pepper, and dried thyme (if using) to create the pickling liquid. Pour over the octopus, ensuring all pieces are completely immersed.
If using fresh thyme stalks, push them into the jar.
Cover the jar and set aside for at least 4-5 days before serving to allow flavors to develop.
To serve, drain the octopus and arrange on small plates with lemon wedges. Accompany with cubes of one-day-old bread on cocktail sticks.