Place rice noodles in a bowl of very hot water for 8 minutes until softened but firm, then drain.
In a small bowl, whisk together the tamari, fish sauce, maple syrup, and lime juice to create the sauce.
Heat the sesame oil in a large skillet or wok over medium-high heat.
Add the minced garlic and shrimp to the pan, cooking 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 until just set.
Add the drained noodles and the prepared sauce to the skillet, tossing everything together for 2 minutes.
Fold in the bean sprouts and half of the green onions, cooking for 1 more minute until the sprouts are slightly wilted.
Transfer to a plate and garnish with the remaining green onions and red pepper flakes before serving.