Caramelized Shallot and Feta Pizza

Italians call pizzas without a tomato base ‘blonde’ pizzas, and this recipe is a great way of using the caramelized roast shallots recipe — the sweet, slow-cooked onions and garlic, in their tangy balsamic sauce, go well with the salty feta and the crisp pizza bases, and the fire from the oven adds a delicious smokiness.