Vietnamese lemon grass beef and rice noodle salad

Name: Vietnamese lemon grass beef and rice noodle salad
Ingredients: 2 golden shallots, finely chopped; 4 cloves garlic, finely chopped; 2 stalks lemon grass, finely chopped; 80 ml fish sauce (1/3 cup); 450 gm beef sirloin, cut into strips; 2 small red chillies, finely chopped; 55 gm white sugar (¼ cup); 70 ml lime juice; 60 ml rice vinegar (¼ cup); 250 gm fresh rice sheet noodles; 1 iceberg lettuce, cut into thin wedges; 2 Lebanese cucumbers, cut into julienne; 1 carrot, cut into julienne; 50 gm bean sprouts; 1½ cups coriander leaves (loosely packed); 1½ cups Vietnamese mint leaves (loosely packed); To serve: roasted peanuts, coarsely chopped