No need to add garlic unless you want Garlic Red Mashed Potatoes. Helpful (66) CYBERDAIZEE. Rating: 5 stars. 01/17/2004. I thought this recipe looked a little blah to me so I kicked it up a notch. I sauted some green onion and garlic like others had said and I also added some rosemary. The rosemary gave it such a wonderful aroma and flavor!