Soak the brown rice noodles in very hot water for 15-20 minutes until they are al dente, then drain and set aside.
In a small mixing bowl, whisk together the tamarind paste, coconut aminos, fish sauce, and coconut sugar until the sugar is dissolved.
Heat the avocado oil in a large wok or non-stick skillet over medium-high heat until shimmering.
Add the shrimp and cubed tofu to the pan, searing for 2-3 minutes until the shrimp is pink and the tofu has developed a light golden crust.
Push the shrimp and tofu to one side of the pan, crack the egg into the cleared space, and scramble it quickly until just set.
Stir in the minced garlic and the white parts of the sliced green onions, sautéing for about 30 seconds until fragrant.
Add the drained noodles to the wok and pour the prepared tamarind sauce over the top, tossing vigorously to coat every strand.
Fold in the bean sprouts and the remaining green onion tops, cooking for only 1 minute to ensure the sprouts stay crisp.
Transfer to a plate and garnish with crushed roasted peanuts, red pepper flakes, and a fresh lime wedge for squeezing.