Soak the brown rice noodles in a bowl of hot water for 8 minutes until tender, then drain and set aside.
In a small bowl, whisk together the tamari, lime juice, maple syrup, and red pepper flakes to create the pad thai sauce.
Heat the avocado oil in a large 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 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 set, and then mix it in with the shrimp.
Add the drained noodles and the prepared sauce to the skillet, tossing for 1 minute until the noodles are well coated.
Stir in the bean sprouts and green onions, cooking for just 30 seconds to maintain their fresh crunch.
Garnish the dish with fresh cilantro and serve immediately.