Prepare Nuoc Cham Sauce: In a small bowl, whisk together 4 tablespoons of fish sauce, 2 tablespoons of sugar, juice of 1 lime, and 1 tablespoon of rice vinegar. Add 1 minced garlic clove and sliced chilies, then stir in 4 tablespoons of water. Set aside.

Soak Rice Noodles: Bring water to a rolling boil, then remove from heat. Add 8 ounces of rice noodles and soak for 3-5 minutes until al dente. Drain and rinse under cold water. Set aside.

Make Meatballs: In a bowl, combine 1 pound minced pork, 2 tablespoons fish sauce, 1 tablespoon sugar, 2 minced garlic cloves, 1 tablespoon lemongrass, and 2 chopped green onions. Mix well and form into 1-inch thick patties.

Cook Pork Patties: Heat a skillet over medium-high heat with 2 tablespoons vegetable oil. Cook patties for 3 minutes on each side until golden brown and cooked through. Use a meat thermometer to check 160°F.

Assemble Bowls: Place soaked rice noodles at the bottom of serving bowls. Top with bean sprouts, julienned carrots, and daikon slices. Add cooked pork patties on top.

Garnish and Serve: Sprinkle chopped cilantro and mint over each bowl. Drizzle with Nuoc Cham sauce and serve immediately.