Prepare the filling: Mince garlic and ginger finely. Chop lemongrass into thin slices. In a mixing bowl, combine ground pork, garlic, ginger, lemongrass, fish sauce, soy sauce, and black pepper. Mix thoroughly until well combined. Set aside to marinate for 15 minutes.

Make the dough: In a large mixing bowl, combine flour and salt. Gradually add water while mixing until a smooth dough forms. Knead for 5-7 minutes until elastic. Cover with damp cloth and rest for 10 minutes.

Prepare vegetables: Finely chop cilantro. Dice onions. Slice bell peppers into thin strips. Mix vegetables into the marinated pork filling.

Shape dumplings: Divide dough into 16 equal portions. Roll each portion into a thin circle about 3 inches in diameter. Place 1 tablespoon of filling in the center of each circle. Fold edges up and pinch to seal, creating pleated edges.

Cook dumplings: Heat vegetable oil in a large skillet over medium-high heat. Place dumplings flat-side down in the skillet. Cook for 3-4 minutes until golden brown. Add 1/4 cup water to the skillet and immediately cover with lid. Steam for 6-8 minutes until pork is fully cooked.

Make dipping sauce: In a small bowl, combine lime juice, honey, hot sauce, and fish sauce. Whisk until honey dissolves. Add chopped cilantro.

Serve immediately: Transfer dumplings to serving plate. Garnish with fresh cilantro leaves and lime wedges. Serve hot with dipping sauce on the side.