1. Prepare the noodles: Soak the rice noodles in warm water for about 20 minutes or until they are soft. Drain and set aside
2. Make the sauce: In a small bowl, mix together the fish sauce, tamarind paste, soy sauce, brown sugar, and chili powder. Set aside
3. Cook the protein: Heat 1 tablespoon of vegetable oil in a large pan or wok over medium-high heat. Add the chicken (or shrimp/tofu) and cook until it's done. Remove from the pan and set aside
4. Cook the eggs: In the same pan, add the remaining tablespoon of oil. Pour in the beaten eggs and scramble until fully cooked