Razor Clams with Chile-Lime Vinaigrette

12 razor clams3 tbsp extra-virgin olive oil (plus 1 tbsp more for drizzling)1 zest of a lime2 tbsp fresh lime juice1 tbsp cilantro (for garnish)3 Thai chiles (finely minced)1 clove garlickosher salt (to taste) Appetizer, Main...