We found this Parilla restaurant around the corner from the 4 Points by Sheraton hotel in the city centre. The service was excellent - the manager/owner speaks good English and the food was superb.
Complimentary shots at the end just added to the experience!
San Jose 1065
Tel: 903 2120
www.locosdeasar.com
Updates
I visited Locos de Asar Restaurant too and, yes, it is a great place. The owners of Locos de Asar opened a new restaurant in Montevideo, its name is Tannat Restaurante and its website is www.tannatrestaurant.com
Is this your business?