Soak the brown rice noodles in a bowl of very hot water for 8-10 minutes until tender but firm, then drain and set aside.
In a small jar, whisk together the tamari, lime juice, fish sauce, maple syrup, and red pepper flakes to create the sauce.
Heat the avocado oil in a large wok or skillet over medium-high heat and sauté the minced garlic for 30 seconds until fragrant.
Add the shrimp to the skillet and cook for 2-3 minutes until they turn pink and opaque, then push them to one side of the pan.
Crack the egg into the empty side of the pan, scramble it quickly until just set, and then mix it in with the shrimp.
Add the drained noodles, bean sprouts, and the prepared sauce to the pan, tossing everything together for 2 minutes until well-coated and heated through.
Remove from heat and serve immediately, topped with sliced scallions and crushed peanuts.