Place the brown rice noodles in a bowl of hot water and soak for 10 minutes until pliable but still firm, then drain.
In a small jar, whisk together the tamari, fish sauce, honey, lime juice, and red pepper flakes to create the pad thai sauce.
Heat the avocado oil in a large wok or skillet over medium-high heat and sauté the minced garlic until fragrant.
Add the shrimp to the pan and cook for 2-3 minutes until they turn pink and opaque, then push them to the side of the pan.
Crack the egg into the empty side of the pan, scramble it quickly until set, and then toss it together with the shrimp.
Add the drained noodles and the prepared sauce to the pan, tossing constantly for 2 minutes until the noodles are tender and coated.
Stir in the bean sprouts and sliced green onions, cooking for just 30 seconds more to maintain their crunch before serving.