Rub the garlic over the surface of the bread slices. Use as many as needed, usually 3 are good.
I state that this serves 4 as an appetizer. It will feed 6 if you have other dishes as well. It will feed 2-3 as dinner!
The topping can keep in the fridge till needed as long as you don't dress it ahead of time.
Feel free to use more of the various components as you see fit. Just adjust the dressing to accommodate the additional amount.