Grill them in an oven, don't microwave. They are as good as fresh and crunchy. Some places even let you buy the "restaurant" or "catering" frozen bread/buns th

Grill them in an oven, don't microwave. They are as good as fresh and crunchy. Some places even let you buy the "restaurant" or "catering" frozen bread/buns that are pre-cooked but not fully baked. So they're risen, half-baked and frozen, ready to be "baked" from frozen by the final restaurant/caterer. That's how restaurants do it, they don't all bake or buy fresh-bread every day.