01 - Combine ground pork with half the minced garlic and shallots, 1 tbsp fish sauce, 1 tbsp sugar, oyster sauce, soy sauce, black pepper, and a splash of oil in a large bowl. Mix thoroughly until well incorporated, then shape into small patties approximately 1 inch thick.
02 - Place thinly sliced pork shoulder or belly in a separate bowl. Coat with remaining garlic, shallots, fish sauce, sugar, and oil. Toss to ensure even coverage. Let both patties and sliced pork marinate for at least 15 minutes at room temperature.
03 - Dissolve sugar in warm water completely. Stir in fish sauce, rice vinegar or lime juice, minced garlic, sliced chili, and julienned carrot if using. Taste and adjust seasoning to achieve balance of sweet, salty, sour, and spicy flavors.
04 - Prepare rice vermicelli noodles according to package instructions, typically boiling for 3-5 minutes until tender. Drain thoroughly and rinse under cold running water to stop cooking process and prevent sticking. Set aside.
05 - Preheat grill or grill pan over medium-high heat. Cook pork patties and marinated pork slices for 3-4 minutes per side until cooked through and nicely caramelized with charred edges. Internal temperature should reach 145°F.
06 - Arrange cooked noodles on serving plates or shallow bowls. Surround with torn lettuce, fresh herbs (cilantro, mint, Thai basil), bean sprouts, and sliced cucumber for a colorful presentation.
07 - Place grilled pork patties and slices alongside prepared vegetables. Serve dipping sauce in individual small bowls. Diners should combine noodles, pork, herbs, and vegetables in their own bowls, then dip each bite into the sauce.