To soften the noodles, in a bowl, soak the glass noodles in the hot water for 5 minutes until softened. Drain well and form into small nests on a heatproof plate.
To prepare the shrimp, butterfly each shrimp by slicing along the back without cutting through. Make a small slit in the center and thread the tail through. Arrange on top of the noodle nests.
To make the sauce, in a heatproof bowl, combine the garlic, red finger pepper, soy sauce, oyster sauce, and white pepper. In a pan over high heat, heat the cooking oil until smoking and carefully pour over the garlic mixture.
To steam, spoon the sauce evenly over the shrimp and noodles. Steam over high heat for about 3 minutes, until the shrimp turn pink and reach 145°F (63°C) internally.
To finish, sprinkle scallions on top. Optional: heat 1 tablespoon cooking oil until smoking and pour over the scallions for extra aroma. Serve immediately.