Yes! If you don't have time to let your frozen green beans thaw, you can follow this method for roasting frozen green beans: Preheat oven to 425 degrees F. Gently grease a large baking sheet. Evenly distribute frozen green beans on baking sheet. Place in preheated oven for 10-15 minutes, or until beans are warmed through and brighter green. Remove warmed beans from the oven and add olive oil & spices. Roast 10 minutes and then add parmesan cheese and continue with the recipe as directed.