Soak the brown rice noodles in a bowl of very hot water for 5-7 minutes until pliable but still firm, then drain.
In a small bowl, whisk together the coconut aminos, fish sauce, tamarind paste, juice from the lime, and red pepper flakes.
Heat the toasted sesame oil in a large wok or non-stick skillet over medium-high heat.
Add the minced garlic and shrimp to the pan, sautéing for 2-3 minutes until the shrimp are pink and opaque.
Push the shrimp to one side of the pan and crack the egg into the empty space, scrambling it quickly until just set.
Add the drained noodles, the prepared sauce, and the bean sprouts to the pan.
Toss everything together vigorously for 1-2 minutes until the noodles are tender and the sauce has thickened to coat the ingredients.
Remove from heat and garnish with sliced green onions and crushed peanuts before serving.