In this question there are various opinions regarding pizza and the Bracha you make on it. How should one view Calzones? Furthermore, is it considered a Memula similar to Pashtida (OC 168:17)?
According to OU, there is a dispute on this:
The bracha on calzones and the like, filled with cheese or meat (known as “pashtida” in the language of the poskim), is not as clear. A fruit pie is a Mezonos because it is a dessert item, while calzones are often intended to be the main meal and not dessert. Although the Taz (168:20) rules that the bracha on calzones is Mezonos, the Shulchan Aruch (168:17), and Mishna Berura (168:94) rule that the bracha is Hamotzi. However, the Biur Halacha states that many Achronim agree with the Taz, and if the calzone is clearly not meant as a main-meal type of food, the bracha is definitely Mezonos. Rav Belsky, zt”l said that it is unclear whether pizza is a snack or meal food, but noted that the general custom is to say Mezonos when eating a small amount.
In view of what DoubleAA mentioned in the comment above, my thinking is that calzones are usually eaten as a meal, and I think that would, thus, qualify it as Hamotzi. This is an area to ask your rav. I'd like to know his answer. I'm hoping that the answer is not "I'm not sure. Why don't you eat a piece of challah first?"