A farm-grown young pumpkin, small and tender, with pale green skin and soft seeds that scoop out easily.
Scoop out the seeds and cut the young pumpkin into small, even chunks so it cooks through quickly.
Seed and stem the green and red peppers, then cut them into small chunks the same size as the pumpkin.
Twist off the heads of the red-claw, blue-tail, and tiger shrimp with a slow pull so the head and the digestive tract come away together.
Peel the shrimp shells but leave the tails on for a neat, springy bite.
Butterfly the backs and keep the yellow tomalley, which is edible and turns red when cooked; then toss the shrimp with white pepper, Shaoxing wine, and salt for a base flavor.
Heat oil in the wok, slide in the shrimp tails, and stir-fry just until they lose their raw look, then drain and set aside.
In a clean wok with a little oil, fry the scallion, ginger, and garlic until fragrant.
Add the young pumpkin and stir-fry over high heat.
Add about half a spoon of oyster sauce and toss to build a savory base.
Add a small spoon of light soy sauce and toss until the pumpkin takes on color.
Stir-fry the pumpkin until just tender, then return the seared shrimp and the peppers, season with salt, and toss everything evenly.
The finished dish is sweeter and more tender than meat, with glossy pumpkin and plump shrimp.
A low-fat, vegetable-forward plate that still feels like a treat.