Courtesy of Gail Simmons.
Heat canola oil in a medium sauté pan until just before smoking. In a shallow bowl, toss shallots with flour, shaking off any excess. Fry shallots in oil, stirring gently until golden, about 5 minutes. Using a slotted spoon, transfer shallots to a paper towel-lined plate to drain. Season immediately with ½ teaspoon salt.
In a large saucepan, combine 4 cups Iced Tea, water, bruised lemongrass, sliced ginger, 10 cilantro stems and remaining teaspoon salt and bring to a boil. Add rice noodles and cook until just tender, about 7 minutes. Drain and rinse thoroughly under cold water until chilled. Shake out any excess water and spread noodles on a paper towel-lined tray.
For dressing, combine reserved lemongrass, reserved ginger, chiles, soy sauce, fish sauce, lime juice, brown sugar and remaining ¼ cup Iced Tea in a blender or food processor and pulse until smooth.
Place noodles, cucumbers, carrots, radishes, mint, cilantro leaves and chicken or shrimp (if desired) in a large bowl. Add dressing to taste and toss well. Garnish with fried shallots and crushed peanuts before serving.