By day he makes your spicy-tofu banh mi sandwiches; by night he spins your favorite dance beats. For the past seven years, Peter Schroeder, aka DJ Gatsby, has been building a name for himself in the metro-Denver area, most notably spinning hip-hop records at the Pour House, Crimson Hilt Tattoo and elsewhere. While the sun is still up, though, you can catch him at Vinh Xuong Bakery in the Alameda Square Shopping Center, putting together some of the best Vietnamese sandwiches around.