Soak the rice noodles in very hot water for 8-10 minutes until tender but firm, then drain.
In a small bowl, whisk together the tamari, fish sauce, maple syrup, and lime juice to create the stir-fry sauce.
Heat the avocado oil in a large skillet or wok over medium-high heat and sauté the minced garlic for 30 seconds.
Add the shrimp to the pan and cook for 2-3 minutes until they turn pink and opaque.
Push the shrimp to one side of the pan, crack the egg into the empty space, and scramble until just set.
Add the drained noodles and the prepared sauce to the pan, tossing everything together for 1-2 minutes until the noodles absorb the liquid.
Fold in the bean sprouts and sliced scallions, cooking for an additional 30 seconds to slightly soften.
Serve immediately topped with crushed peanuts and red pepper flakes for a hint of heat.