Slice baby corn and shiitake; hand-tear oyster mushrooms. Soak vegan ham in water to thaw, then cut into thin strips. Wash greens, trim root ends, and chop into short pieces.
Place instant noodles in a large bowl and pour hot water over to cover. Do NOT cover the bowl; remove as soon as the noodles loosen. Rinse immediately in cold water and drain well to keep them springy.
Heat oil in a wok over medium heat. Sauté shiitake, oyster mushrooms, and vegan ham until golden and fragrant, then push to one side.
Add chopped greens and stir-fry over high heat until about half-cooked. Add drained noodles and toss with chopsticks plus spatula.
Add soy sauce, vegan oyster sauce, white pepper, dark soy sauce, and salt; toss well. Add 60 ml water if dry. Optionally stir in curry powder. Keep stir-frying over high heat for 1-2 minutes until fragrant and glossy. Serve hot.