Wash the fresh herbs and lettuce, then let them drain. Peel and finely chop the garlic and ginger. Peel the onion and cut into wedges. Rinse the beef and slice it thinly. Marinate the beef with a little cooking oil, fish sauce, and chopped ginger for about 15 minutes.

Heat oil in a pan, sauté the garlic until fragrant, then add the beef and onion. Stir-fry quickly over high heat. Cook the beef just until medium rare, then turn off the heat. Sprinkle with black pepper for extra flavor.

Lay out the rice noodle sheets, place lettuce, fresh herbs, and stir-fried beef on top, then roll tightly.

For the dipping sauce: Mix sugar, fish sauce, lime juice, water, minced garlic, and chopped chili until well combined.