Red Curry Moules Frites

Name: Red Curry Moules Frites
Ingredients: 3 tablespoons Olive Oil, divided; 2 russet potatoes, peeled and cut in 1/4 inch matchsticks; 1 tablespoon white vinegar; 1 shallot, finely chopped; 4 cloves of garlic, minced; 1 tablespoon ginger, minced; 1/2 cup white ale; 1 stalk of lemongrass, bruised with the back of a knife; 2 pounds mussels, scrubbed and de-bearded; 1 tablespoon fish sauce; 4 tablespoons red curry paste; 13.5 ounces unsweetened coconut milk; 1 tablespoon lime juice; 2 tablespoons cilantro, chopped, for garnish; salt