Soak the brown rice noodles in hot water for 8 to 10 minutes until al dente, then drain and set aside.
In a small bowl, whisk together the tamarind paste, tamari, and honey to create the Pad Thai sauce.
Heat avocado oil in a large wok or skillet over medium-high heat.
Add the shrimp and minced garlic to the pan, sautéing until the shrimp are pink and opaque.
Push the shrimp to one side of the pan, crack the egg into the empty space, and scramble until just set.
Add the cooked noodles and the prepared sauce to the pan, tossing everything together until the noodles are well-coated and steaming.
Fold in the bean sprouts, sliced green onions, and red pepper flakes, cooking for just one more minute.
Serve immediately with a fresh squeeze of lime juice for a bright finish.