Place the brown rice noodles in a bowl of very hot water and soak for 8-10 minutes until tender but firm, then drain and set aside.
In a small bowl, whisk together the tamari, lime juice, honey, and fish sauce to create the Pad Thai sauce.
Heat the avocado oil in a large skillet or wok over medium-high heat. Add the minced garlic and shrimp, sautéing 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. Scramble the egg quickly until just set, then mix it in with the shrimp.
Add the drained noodles and the prepared sauce to the pan, tossing everything together for 1-2 minutes until the noodles are well-coated and heated through.
Fold in the bean sprouts and chopped green onions, cooking for just 30 seconds to maintain their crunch.
Plate the noodles and garnish with crushed peanuts and red pepper flakes before serving.