Preheat a baking sheet under the broiler. Divide 1 pound refrigerated pizza dough into 4 balls; coat with olive oil and season with salt. Roll in 1/4 cup sesame seeds. Thinly stretch out the dough and broil, two at a time, on the hot baking sheet until golden, 3 minutes per side. Serve with plain Greek yogurt mixed with harissa and olive oil.