In a small bowl, whisk together the tamarind paste, soy sauce, lime juice, sugar, and fish sauce until the sugar dissolves. Taste and adjust as needed:
Add more tamarind for a tangier sauce.
Add more lime juice for brightness.
Add more sugar for sweetness.
Add additional fish sauce for a deeper savory flavor.
Step 3: Cook the Chicken
Heat 1 to 1½ tablespoons of vegetable oil in a large skillet or wok over medium-high heat.
Add the garlic and cook for about 30 seconds until fragrant.
Add the sliced chicken and cook for 3–4 minutes, stirring frequently, until the chicken is nearly cooked through.
Step 4: Cook the Eggs
Push the chicken to one side of the pan. If needed, add a little more oil.
Crack the eggs into the skillet and scramble until just set, then stir them together with the chicken.
Step 5: Add the Vegetables and Noodles
Stir in the bean sprouts and cook for 30–60 seconds until they begin to soften.
Add the drained noodles and pour the prepared sauce over everything.
Using tongs, gently toss the noodles with the chicken and vegetables for 2–3 minutes until the noodles are evenly coated and tender.
If the noodles begin to dry out before they're fully cooked, add 1–3 tablespoons of water, one tablespoon at a time, while tossing.
Finish and Serve
Add the green onions and cook for about 1 minute until slightly softened.
Remove from the heat and divide among serving plates.
Top with chopped roasted peanuts and serve immediately with fresh lime wedges.