• Heat a large (8-qt.) heavy-duty Dutch oven over medium heat.
• Add 3 Tbs. oil and a couple of popcorn kernels, cover, and cook until the popcorn pops, about 3 minutes.
• Add the remaining popcorn kernels and cook, occasionally shaking the pot, until most of the kernels pop and the rate of popping almost completely slows, about 3 minutes. Add the rosemary sprigs and toss for 15 seconds off the heat.
• Transfer the popcorn to a large bowl and toss with the remaining 2 Tbs. oil, the Parmigano-Reggiano, and salt. Serve immediately.

Tip: If you have a popcorn popper, have at it, but this stovetop method is quick and easy. For the best flavor, use imported Parmigiano-Reggiano. Add the zest of one lemon if you want to give this snack a twist.