In a medium bowl, combine the two types of Gordal olives, black mission olives, cauliflower, capers, celery, carrot, cocktail onions, celery seed, oregano, basil, black pepper, oregano balsamic vinegar, and basil olive oil.
Mix together and transfer mixture into a glass jar (or other nonreactive container). If needed, pour in more oil to cover.
Cover jar or container and refrigerate at least overnight.
To Make Sandwiches:
Cut loaves of bread in half horizontally; hollow out some of the excess bread to make room for filling.