You can absolutely use a bag of natural microwave popcorn rather than preparing it on the stop stovetop.
Add canola oil and popcorn to a large sauce pan with a tight fitting lid.
Over medium heat, warm the popcorn until you start to hear the first kernels pop (about 3-4 minutes).
As the corn pops, shake the pan frequently until the popping subsides. Remove from heat and wait 2-3 minutes until kernels stop popping.
Add lime zest and salt to a large bowl. Pour warm popcorn over top. Mix throughly while intermittently spraying popcorn with olive oil and sprinkling with freshly ground black pepper to taste.
For best results, serve immediately.