Heat a saucepan over medium-low heat.
Coat the bottom with oil and add the garlic and bay leaf.
Cook, stirring until very aromatic, about 4 minutes.
Toss in the clams and stir to coat in the mixture and get a sizzle going on them.
Add the vinho Verde and cilantro sprigs.
Cover, raise the heat to medium-high, and cook, shaking the saucepan frequently, until the clams start to open about 5 to 8 minutes.
The liquid should be boiling vigorously. Pull out the clams that open first and put them in a dish.
Cover the saucepan again and continue cooking and pulling until all the clams open. After 5 minutes, any clams that don't open are dead; throw them out.
Discard the bay leaf and cilantro sprigs.
Strain the sauce into a large bowl.
Swirl in 1 tbsp olive oil then fold in the clams and cilantro.
Serve immediately with plenty of crusty bread.