Yes, it's possible to make calzones in the mountains. All you need is yeast, flour, salt, and lukewarm water to make the dough (let it rise in your jacket). Tomato paste and some spices to make the sauce. Then lots of cheese, onions, garlic, and anything else for the inside. Cook it in a pan with a lid and use cornmeal so it doesn't stick. You end up with the most delicious mountain food you can imagine.