If you’re seeking a Vietnamese restaurant that’s authentic and economical, Bun Belly probably isn’t for you. But this small self-described “contemporary” place has the bonuses of a smart interior (blond bamboo paneling and “sputnik” lighting fixtures) and prices that are fine if you can handle $9 for a good-sized but not huge bowl of pho. Presentation is a strong point, as with the bright, flavorful, and beautifully arranged shrimp spring rolls. We had mixed feelings about the banh mi (we loved the crisp baguette and the pork belly but weren’t crazy about the rather strong pork-liver pâté), but absolutely worth a return trip was a vermicelli bowl with lemongrass-chile-garlic beef. Pistachio ice cream “sandwiches” sounded like great fun, but the grilled buns were so soft they were indistinguishable from the ice cream.