Soak the dry rice noodles in a bowl of hot water for 20 to 30 minutes until they are pliable but still firm to the bite, then drain thoroughly.
In a small glass bowl, whisk together the tamarind paste, tamari, fish sauce, and maple syrup until the mixture is smooth and well combined.
Heat the avocado oil in a large wok or stainless steel skillet over medium-high heat, then add the minced garlic and sauté for 30 seconds until fragrant.
Add the shrimp to the pan and cook for about 2 minutes per side until they turn pink and opaque, then push them to the outer edge of the pan.
Crack the egg into the center of the pan, scramble quickly until just set, and then toss it together with the shrimp.
Add the drained noodles and the prepared tamarind sauce to the pan, tossing constantly for 2 to 3 minutes until the noodles have absorbed the sauce and softened.
Fold in the bean sprouts and sliced green onions, cooking for just 1 minute more until the sprouts are slightly wilted but still retain a crunch.
Remove from heat and serve immediately, garnished with crushed peanuts, red pepper flakes, and a generous squeeze of fresh lime juice.