Soak the brown rice noodles in hot water for 5-7 minutes until al dente, then drain and set aside.
In a small bowl, whisk together the tamarind paste, coconut aminos, 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 to the skillet, 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, scrambling it quickly until just set.
Add the soaked noodles, prepared sauce, and bean sprouts to the skillet, tossing everything together for 1-2 minutes until heated through and well-coated.
Plate the noodles and garnish with sliced green onions, crushed peanuts, red pepper flakes, and a generous squeeze of fresh lime juice.