El Barril Mexican Grill, located in Maryville, TN, offers a variety of Mexican dishes with options for vegetarians. The menu includes appetizers like Cheese Dip and Jalapenos Rellenos, as well as main dishes like Pollo Fundido and Carnitas Michoacanas. Customers rave about the authentic flavors, quick service, and friendly staff. The restaurant provides a casual dining experience with outdoor seating, a full bar, and free Wi-Fi. Reviewers highlight the fast service, generous portions, and clean atmosphere. The restaurant also accommodates special requests, such as customizing dishes to suit preferences. Overall, El Barril Mexican Grill is highly recommended for delicious Mexican cuisine in a welcoming environment.