Cook the rice noodles according to package directions. I usually get a large bowl, pour over boiling water and cover with a tea towel for 5 minutes. Drain, and toss with 1 tablespoon of oil. Set aside.
In a bowl, mix the brown sugar, fish sauce, soy sauce, tamarind paste, peanut butter, Sriracha sauce if using, and ground black pepper together. Set aside.
In a large wok or deep frying pan, heat the remaining oil over a high heat, and stir fry the chicken for 2 to 3 minutes until the chicken starts to colour. Turn off the heat, and spoon the chicken onto a place and put to one side.
Turn the heat back to high, and stir fry the garlic, bean sprouts, and spring onions for a couple of minutes.
Next, add the beaten egg, and stir quickly until the egg begins to scramble.
Then add the chicken, the sauce and stir to combine. Then add the noodles and combine well to coat in the sauce.
Squeeze over the lime juice, sprinkle peanuts on top before serving and a squeeze of lime juice, as well as a sprinkle of some fresh coriander. Enjoy.