Soak the noodles: Place dried rice noodles in a large bowl and cover with very warm water.
Soak 20–30 minutes until pliable but not fully soft. Drain and set aside.
Make the sauce: In a small bowl, mix tamarind concentrate, fish sauce, sugar, and chili. Stir until the sugar dissolves.
Taste and balance: it should be tangy first, then salty and sweet. Adjust to your liking.
Prep your ingredients: Slice the chicken thinly. Mince garlic, slice shallot, and chop peanuts.
Beat the eggs and keep everything close to the stove. Pad Thai cooks fast.
Heat the pan: Use a large wok or wide skillet over medium-high heat. Add 1 tablespoon oil and swirl to coat.
Cook the chicken: Add chicken and a pinch of salt.
Stir-fry 3–4 minutes until just cooked through and lightly golden. Transfer to a plate.
Sauté aromatics: Add another teaspoon of oil. Cook shallot and garlic for 30–45 seconds until fragrant, not browned.
Scramble the eggs: Push the aromatics to the side.
Add a little oil if needed, then pour in the eggs. Let them set for a few seconds, then scramble into soft curds.
Add noodles and sauce: Add the drained noodles and chicken back to the pan. Pour over the sauce.
Toss continuously for 2–3 minutes until the noodles absorb the sauce and turn glossy. If the pan is dry, splash in 1–2 tablespoons water to help the noodles loosen and finish cooking.
Finish with crunch and freshness: Add bean sprouts and the white parts of the green onions. Toss for 30–60 seconds, just until slightly wilted but still crisp.
Plate and garnish: Remove from heat.
Top with chopped peanuts, the green parts of the onions, cilantro (if using), and lime wedges. Serve immediately.