The term 'Fillable Bread' can be summarized as a type of bread that can be filled with various ingredients. The most common example is PITA, which is a flatbread originating from the Middle East. It is made from wheat flour and is usually round in shape, with a pocket in the middle that can be filled with various ingredients such as meats, vegetables, and sauces. PITA is a popular choice for sandwiches and wraps, and is also used to make pizzas and other dishes.