Place the brown rice noodles in a bowl of hot water and soak for 10-15 minutes until softened but still firm, then drain.
In a small jar, whisk together the tamarind paste, coconut aminos, fish sauce, and honey until the sauce is smooth.
Heat the avocado oil in a large wok or non-stick skillet over medium-high heat and add the diced chicken breast.
Cook the chicken for 5-6 minutes until golden and cooked through, then add the minced garlic and red pepper flakes for 30 seconds.
Push the chicken to one side of the pan and crack the egg into the empty space, scrambling it quickly until set.
Add the drained noodles and the prepared tamarind sauce to the pan, tossing everything together for 2 minutes until the noodles are coated and tender.
Fold in the bean sprouts and green onions, cooking for just 1 minute more to maintain their crisp texture.
Serve immediately topped with fresh cilantro and a generous squeeze of lime juice.