Preheat oven to 400°F. Spray a cookie sheet with nonstick cooking spray.
Slice the chicken breasts into bite-sized pieces.
Put the breadcrumbs, ¼ teaspoon salt, and ¼ teaspoon pepper into a gallon-size resealable bag. Add the chicken pieces, seal the bag, and shake until the pieces are evenly coated.
Arrange the coated chicken pieces in a single layer on the prepared cookie sheet.
Bake for about 20 minutes, flipping the pieces after 10 minutes, until the chicken is cooked through and no longer pink in the center.
While the chicken bakes, slice the green parts of the 2 green onions. Set aside a small handful of the sliced green onion for garnish and use the remainder in the sauce.
In a medium saucepan combine 1 cup water, ¼ cup honey, ½ cup fresh orange juice, 1 tablespoon soy sauce, 1 pressed clove garlic, 1 tablespoon orange zest, ½ teaspoon fresh ginger (zested), and 1/8 teaspoon dried red pepper flakes. Whisk to combine.
Heat the saucepan over medium heat and bring the mixture to a boil. Add the sliced green onion pieces reserved for the sauce.
Taste the sauce and, if desired, adjust by adding a little more soy sauce or more red pepper flakes to suit your preference.
In a small bowl, stir together 3 tablespoons cornstarch and 2 tablespoons cold water until completely smooth and lump-free.
With the sauce boiling, slowly pour the cornstarch slurry into the saucepan while whisking continuously. Continue to cook and whisk until the sauce thickens (this will happen quickly).
When the chicken is done, transfer the baked chicken pieces into the saucepan and stir gently to coat all pieces with the sauce.
Serve the coated chicken hot, garnished with the reserved sliced green onion.