Mix tamarind pulp with ½ cup boiling water until dissolved. Strain and discard solids. Mix liquid with all other sauce ingredients and set aside.
Soak pad thai noodles in hot water for 20 minutes, strain.
Marinate chicken in soy sauce, cornstarch, and water. Set aside.
Prepare all vegetables and measure out ingredients.
Heat 2 tbsp oil in wok over high heat. Add the chicken and sear on both sides. Remove cooked chicken and set aside.
Add 3 tbsp of oil to wok. Add garlic and cook for 30 seconds.
Add shallots and cook for another 30 seconds.
Add the noodles and sauce to pan, stir to combine.
Push noodles to one side, drizzle oil on empty side. Pour beaten eggs into the oil and gently scramble. Once eggs are mostly cooked, mix with noodles.
Add bean sprouts and chives. Cook until chives wilt.
Add chicken to pan and stir to combine.
Serve with chopped peanuts, lime wedge, and green onion. Enjoy!