Prepare the brown rice noodles according to package instructions until al dente, then drain and set aside.
In a small bowl, whisk together the tamari, fish sauce, maple syrup, lime juice, and red pepper flakes to create the sauce.
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 the side of the pan, crack the egg into the space, and scramble it until just set.
Add the cooked noodles, bean sprouts, and half of the sliced green onions to the pan.
Pour the prepared sauce over the mixture and toss constantly for 2 minutes until the noodles are glossy and well-coated.
Divide onto a plate and garnish with the remaining green onions and crushed peanuts before serving.