Mie Goreng Shanghai (Cu Chao Mian)

Bahan-bahan (4 porsi)

• 6 ounces daging babi tanpa tulang ((bahu babi, pantat atau pinggang, diiris tipis-tipis))
• 3/4 teaspoon kanji dr tepung jagung
• ½ teaspoon kecap ringan
• 1/8 teaspoon kecap hitam
• 1 teaspoon shaoxing wine ((or dry cooking sherry))
• 1/8 teaspoon gula
• 3 tablespoons neutral oil ((such as vegetable, canola, or avocado oil, divided))
• 8 shiitake mushrooms ((fresh or dried, thinly sliced))
• 1 pound Japanese-style udon noodles
• 2 1/2 teaspoons kecap ringan
• 2 1/2 teaspoons kecap hitam
• ¼ teaspoon gula
• 1 bunch choy sum or baby bok choy