Clean the lemongrass andchop finelythe soft inside.
Peel and chop the garlic.
Mix the meat strips with lemongrass, half of the garlic, 1 tablespoon fish sauce, 1 teaspoon sugar and 1⁄4 teaspoon pepper and let steep for 30 minutes.
Chili wash, core and chopping, crushed with the rest of garlic in a mortar with 1 ½ EL fish sauce, 1 ½ EL sugars, lime juice and 3 EL stir cold water.
Wash the mint, lettuce, cucumber, radish and sprouts and cut into strips.
Peel the onion, cut into strips and sauté with the meat in a pan.