Beef With Vermicelli Noodles - 2 stalks lemongrass, 2 pounds ground pork, 1 tablespoon fish sauce, 2 1/2 teaspoons kosher salt, 2 teaspoons sugar, 1/4 teaspoon white pepper, 1/4 cup fish sauce, 2 tablespoons sugar, 2 tablespoons lime juice or white vinegar, 1 clove garlic, peeled and minced.