Soak the rice noodles in a bowl of very hot water for 8 to 10 minutes until they are al dente, then drain and set aside.
In a small mixing bowl, whisk together the tamari, fish sauce, lime juice, maple syrup, and red pepper flakes to create the sauce.
Heat the avocado oil in a large skillet or wok over medium-high heat.
Add the minced garlic and shrimp to the skillet, sautéing for 2 to 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 soaked noodles and the prepared sauce to the skillet, tossing everything together vigorously to ensure even coating.
Fold in the bean sprouts and sliced green onions, cooking for an additional 60 seconds until the sprouts are slightly wilted but still crisp.
Remove from heat and serve immediately, garnished with crushed peanuts and an optional extra lime wedge.