Soak the brown rice noodles in a bowl of very hot water for about 20-30 minutes until pliable but still firm.
In a small bowl, whisk together the fish sauce, tamarind paste, honey, lime juice, and red pepper flakes to create the sauce.
Heat the avocado oil in a large non-stick skillet or wok over medium-high heat and add the minced garlic, sautéing for 30 seconds.
Add the shrimp to the skillet and cook for 2-3 minutes until they turn pink and opaque, then push them to one side of the pan.
Crack the egg into the empty side of the skillet, scrambling it quickly until just set, then mix it in with the shrimp.
Drain the noodles and add them to the skillet along with the prepared sauce, tossing constantly for 2 minutes until the noodles absorb the liquid.
Fold in the fresh bean sprouts and green onions, cooking for just 30 seconds more to maintain their crunch.
Plate the Pad Thai and top with crushed peanuts before serving immediately.