Cut the soy noodles, bean sprouts, onion, carrot, bell pepper, tofu, and scallions into bite-sized pieces.
Soak the rice noodles in hot water for 10 minutes, then drain.
Heat cooking oil in a pan and stir-fry the onion, carrot, and bell pepper.
Add tofu and bean sprouts, then stir-fry together.
Add the soaked rice noodles and stir-fry while adding soy milk, soy sauce, tamarind sauce, and sugar.
When all ingredients are well mixed, top with crushed peanuts and scallions to finish.