Review of Burger 21

Needed lunch to go at the airport. Gluten free bun, no fries. Staff wasn’t knowledgeable but they were cautious first saying that all they have gluten free is the bun. Questioned about the burger and they said oh right, yep that’s all beef. I double checked that nothing is cooked on the same grill top as the burger. They were very nice and accommodating- I ordered before they actually started serving lunch but I needed something for my long flight home and GF reviews of their area restaurant chain are very good.