Heat ¼ cup of the olive oil and add the onions, garlic, thyme and bay leaf. Cook, stirring occasionally, until most of the moisture has evaporated and the onion mixture is very soft, almost smooth, and caramelized, about 45 minutes. Discard the bay leaf and season with salt and pepper.
Cover the dough with the onion mixture, sprinkle with pine nuts, add tomato sauce & marscarpone, then drizzle with remaining olive oil. Bake in pre-heated 500 degree oven for 10 minutes or until golden brown. The baking time will vary depending on whether you bake on a stone, a screen or in a pan. Be sure that your oven is well pre-heated before putting pizza in. Pull from the oven and add prosciutto crudo.