At its heart, a roasted tomato burrata dip is a functional work of culinary art. It consists of a base of cherry or grape tomatoes that have been roasted until they burst, creating a natural, chunky sauce flavored with garlic and olive oil. In the center of this warm, acidic pool sits a ball of burrata. Burrata is a specialized Italian cow milk cheese made from mozzarella and cream. The outer shell is solid mozzarella, while the inside contains stracciatella and cream, giving it an unusually soft and decadent texture.