Place the brown rice noodles in a large bowl and cover with very hot water, soaking for 8-10 minutes until tender but firm, then drain.
In a small jar, whisk together the tamari, lime juice, and coconut aminos to create the signature savory-tart sauce base.
Heat the toasted sesame oil in a large wok or non-stick skillet over medium-high heat.
Add the minced garlic and red pepper flakes, sautéing for 30 seconds until fragrant before adding the shrimp.
Cook the shrimp for 2-3 minutes until pink and opaque, then push them to one side of the pan.
Crack the egg into the empty side of the pan and scramble quickly until just set.
Add the drained noodles and the prepared sauce to the pan, tossing everything together for 1-2 minutes until the noodles are well-coated.
Fold in the mung bean sprouts and sliced green onions, cooking for just 30 seconds more to maintain their crisp texture.
Divide the pad thai into a bowl and garnish with the crushed peanuts before serving warm.