1. Add oil and two popcorns kernels to a large, heavy-bottomed saucepan over medium heat. Cover and wait for the kernels to pop, which might take a few minutes.
2. Once the kernels pop, turn off the burner, remove from heat and let it cool for about one minute, then pour in remaining popcorn kernels. Cover and give the pot a little shake to distribute the kernels evenly.
3. Put the pot back over medium heat and continue cooking the popcorn, carefully shaking the pot occasionally to cook the kernels evenly. Once the kernels start popping, tip the lid just a touch to allow steam to escape slightly.
4. Continue cooking until the popping sound slows to about one pop every few seconds. Remove the lid and pour popcorn into your serving bowl. Sprinkle with a couple pinches of salt, to taste, and any other topping you would like. Toss well and serve immediately, for best flavor and texture, or within a few hours.