Prepare the brown rice noodles according to package instructions by soaking in hot water until tender, then drain and set aside.
In a small bowl, whisk together the tamari, fish sauce, tamarind paste, maple syrup, and lime juice to create the savory sauce base.
Heat the avocado oil in a large skillet over medium-high heat and sauté the garlic until fragrant.
Add the shrimp to the skillet, seasoning with sea salt and black pepper, and cook until pink and opaque.
Push the shrimp to one side of the pan, crack the egg into the empty space, and scramble until just set.
Toss in the cooked noodles, prepared sauce, bean sprouts, and red pepper flakes, stirring constantly until the noodles are well-coated and heated through.
Garnish with sliced green onions and serve immediately with an extra squeeze of lime.