According to The 42, a DC blog, this pizzeria offers dairy-free/ vegan cheese for their pizzas. From a look at their website, I did confirm the offering, in fact it is Teese vegan “cheese” and available for a small “upgrade” fee.
RedRocks Firebrick Pizzeria
1036 Park Road, NW (Columbia Heights Neighborhood)
Washington, DC 20010
202 506 1402