Meanwhile, shape** each ball of dough into a round pizza. Sprinkle each pizza with a pinch of sea salt. Divide the cheese between the two pizzas. Use your fingers to crush the chiltepins and sprinkle two crushed chiltepins on each pizza. Bake the pizzas the pizza stone for 8 minutes, or until the crust is golden brown and the cheese is bubbly (depending on the size of your pizza stone, you may have to bake one pizza at a time). Top each pizza with one cup of arugula and drizzle each pizza with one teaspoon of truffle oil.