Marinate the Pork: Combine fish sauce, chicken bouillon powder, black pepper, honey, minced garlic, and minced shallots in a bowl. Toss sliced pork belly in the marinade until well coated. For the patties, mix the same marinade directly into the ground pork along with an extra spoonful of minced shallots. Let both rest in the fridge for at least 1 hour — overnight if you can plan ahead.
Shape the Pork Patties: Form the marinated ground pork into small patties about 2 inches wide, similar to slider burgers. Press them slightly flat so they cook evenly and develop a caramelized crust while staying tender inside.
Prepare the Pickled Vegetables: Slice carrots and daikon into half-moons. Stir together sugar, white vinegar, and warm water until the sugar dissolves. Add the vegetables and let them soak while the rest of the dish comes together.
Make the Bún Chả Sauce: Dissolve sugar in hot water. Add fish sauce and vinegar, stir until fully combined. Add minced garlic and sliced chili if using. The finished sauce should taste light, slightly sweet, tangy, and savory — a touch stronger than seems right. It balances once the pork goes in.
Cook the Pork (Broiler/Air Fryer Method): Preheat oven to low broil. Arrange pork belly and patties on a wire rack set over a lined baking tray — the rack is critical for getting char rather than steam. Broil for 8 minutes until the surface begins caramelizing. Flip and broil another 6 minutes. For the final 1–2 minutes, switch to high broil for that deep, lacquered char. Rotate the tray if your oven heats unevenly. Cut pork belly into bite-sized pieces before serving.Air fryer alternative: Cook each side at 375°F for 6 minutes, then finish at 385–390°F for the last 2 minutes. Cook the Rice Vermicelli: Boil noodles according to package directions (usually 8–9 minutes), until tender but still slightly springy. Drain and rinse under cold water immediately to stop cooking. Drain thoroughly.
Assemble & Serve: Place grilled pork belly pieces and patties into individual serving bowls. Ladle warm bún chả dipping sauce over the pork, then add a handful of pickled carrots and daikon. Set the noodles and herb platter in the center for everyone to build their own bowl.
How to Eat: Take a small bundle of noodles, dip into the sauce, add a piece of pork along with fresh herbs or pickled vegetables. Every bite is a different balance of smoky pork, bright herbs, tangy pickles, and savory broth.