How to Make It
In a large bowl, combine the chicken, scallions, half the ginger, the juice from the lime, 2 tablespoons of the oil, 1 teaspoon salt, and ⅛ teaspoon black pepper. Toss to combine well and set aside for 15 minutes.
Meanwhile, in a large saucepan, add the remaining ginger, juiced lime halves, and an inch of water. Place a large steamer basket (or colander) in pan. Bring to a boil.
Remove the chicken from the marinade and place in the steamer in a single layer. Steam until cooked through, about 5 minutes, flipping once halfway through. Remove to a plate and cover to keep warm.
In a large bowl, whisk together the lemon juice, remaining 2 tablespoons oil, ½ teaspoon salt, and ⅛ teaspoon pepper.
Add the spinach, cucumber, red onion, and chili pepper. Toss well. Serve over the chicken.