Soak rice noodles in hot water for 10-15 minutes until tender but firm, then drain.
In a small bowl, whisk together tamarind paste, coconut aminos, fish sauce, and lime juice.
Heat avocado oil in a large skillet or wok over medium-high heat.
Add shrimp and minced garlic, sautéing until the shrimp is pink and opaque.
Push shrimp to the side, crack the egg into the pan, and scramble until just set.
Add the soaked noodles and sauce mixture to the pan, tossing to coat everything evenly.
Stir in bean sprouts and sliced green onions, cooking for 1 minute until slightly wilted.
Garnish with red pepper flakes and chopped fresh cilantro before serving.