• Cut a small corner from the pork packaging and drain off any excess liquid. Transfer to a plate; pat dry with a paper towel.

In a large bowl, combine the pork and char siu marinade, season with salt and pepper, and toss to coat. Let stand while you prepare the noodles, eggs, and remaining ingredients.

Bring a medium sauce pot of water to a boil. Stir in the noodles and cook until just tender, 3 to 4 minutes. Using tongs, transfer the noodles to a colander and rinse with cold water.
Return the water to a boil and fill a small bowl with ice water. Carefully lower the eggs into the boiling water and cook for exactly 6 minutes for soft-cooked (for firmer yolks, cook 1 to 3 minutes longer). Transfer the eggs to the ice water to cool. Carefully peel the eggs. Discard the water and wipe out the pot.
While the noodles and eggs cook, prepare the remaining ingredients.

• Grate or peel and finely chop enough ginger to measure 1 teaspoon [2 tsp].
• Trim the root ends from the scallions; thinly slice the scallions, keeping the light and dark green parts separate.
• Strip the broccoli leaves from half the stems and thinly slice the leaves; save the remaining broccoli leaves for another use.
• In a small bowl or cup, mix the chicken broth concentrate with 1 cup [2 cups] warm water and stir to combine.
• Cut the eggs in half lengthwise.

In a large frying pan over medium-high heat, warm 1 to 2 teaspoons oil until hot but not smoking. Using tongs or a slotted spoon, remove the pork from the marinade, letting the excess drip back into the bowl. Add the pork to the pan and cook, stirring occasionally, until browned and cooked through, 3 to 4 minutes. Transfer to a plate.
While the pork cooks, start the broth.

In the same pot used for the eggs, combine the ginger, light parts of the scallions, chicken broth, and 1 cup [2 cups] water and bring to a boil. Reduce to a simmer, stir in the broccoli leaves, and cook until just wilted, 1 to 2 minutes. Remove from the heat and add half the tamari. Season to taste with salt, pepper, and more tamari if desired.

Transfer the noodles to individual bowls and ladle over the broth and broccoli leaves. Top with the char siu pork, eggs, and dark green parts of the scallions and serve.