Soak the dried rice noodles in room-temperature water for 30-40 minutes until pliable but still slightly firm. Drain and set aside.
Whisk together tamarind paste, fish sauce, brown sugar, soy sauce, lime juice, and sriracha until smooth. Set sauce aside.
Prep all ingredients: slice protein, mince garlic, beat eggs, wash bean sprouts, chop green onions and peanuts. Arrange everything near the stove.
Heat 1 tablespoon oil in a wok over medium-high heat. Cook protein until golden and cooked through, then remove and set aside.
Add 1 tablespoon oil to the wok, pour in beaten eggs, and scramble until just set. Push eggs to one side of the wok.
Add remaining 1 tablespoon oil and garlic to the wok over high heat. Stir-fry for 15-20 seconds until fragrant.
Add drained noodles and toss with garlic. Let sit for 30 seconds to char slightly, then pour sauce over and toss for 1-2 minutes until coated.
Return cooked protein and scrambled eggs to the wok. Toss for 1 minute to heat through, then add half the bean sprouts and green onions.
Toss for another 30 seconds until bean sprouts just begin to soften but remain crunchy. Remove from heat.
Serve immediately topped with remaining fresh bean sprouts, chopped peanuts, red pepper flakes, and lime wedges. Garnish with cilantro if desired.