Heat olive oil in a Dutch oven over medium-high heat. Add popcorn kernels; cover but leave lid partially open. Cook 3 minutes; remove from heat. Close lid until popping stops. Toss with rosemary, garlic powder, salt, and pepper.
I was so excited to make this because it sounded delicious. However, I thought it was bland. Maybe an infused olive oil would make it more flavorful. I'm going to try that next time.