Clean the squid and roughly chop the tentacles. In a saucepan, heat a drizzle of extra virgin olive oil with a clove of garlic, add the fresh baby spinach and the chopped tentacles and cook for a few minutes, until soft. Squeeze the water out of the spinach mixture, chop with a knife and put in a bowl. Add the finely grated Grana Padano, a few tablespoons of breadcrumbs, the eggs, salt and pepper, and mix well.