Place the cauliflower and bay leaf on a baking sheet and drizzle with olive oil and season with salt and pepper. Roast for 15 minutes. Pull pan from oven.
Toss the bread with some olive oil and season it with salt and pepper and add to the cauliflower. Return the pan to the oven and bake for 5 more minutes or until bread is toasted.
Either place in a bowl and add the parsley, cheese, and olives or just add them to the sheet pan. Drizzle with a little olive oil and sherry vinegar.